Box Strainer Fabrication

"My intention is to make it stong by welding the sides of the strainer to steel angles.

would appreciate your help on best way to do this."

The best way is to use a welder.

Now, I know that's not the answer you wanted. So please give us more information. Pretend like you are explaining it someone who knows nothing about what you want to do.

So far we have conctere, steel angle and PVC as materials. Is the box steel, too?

How will it be attached? etc. etc.

Apologize for not being clear

The strainer shape is cube where one side of the cube is open and bolted to a wall.

My question is how to make this strainer (cube) strong enough?

<sigh> Strong enough to.... what?

Come on power engine. You are not giving us much to work with.

Things needed to answer or help to get you on the right track.

1. Particle size that needs to be strained?

2. Is this 4 PVC an over flow or intake to a pump?

3. Is the water saltwater or fresh?

4. How often do you perceive the need to have cleaned?

If you can answer these questions most of us here can better help you!

If this is to be made of steel, attached to concrete - what is the fluid? - water? Corrosion proof construction - stainless steel, galvanized steel, nylon ??

What strength is needed? Will it ever be in a freezing environment? Cube size?

weight of water inside if the strainer is all plugged-will it tear it off the wall?

Is this a strainer to allow the fluid inside to exit the tank after being strained, or is the an incoming strainer to keep bits out of the tank?

"one side of the cube is open and bolted to a wall."

How will you isolate the strainer and stop the water flow when you need to remove the filtering element for cleaning purpose?

You need to have valve between strainer and tank. If yes, what you need is just an outlet, other things could be well outside.

Please see the sketch of the tank setup and the location where the strainer to be installed.

The fluid to be treated is sewage water.

Sometimes the level of water go above the overflow pipe in this case will the strainer withstand the static pressure of water.

Can you please tell me what mesh size shall be used for sewage water. I am thinking to use coarse mesh of 2 mm dia.

Suggest an arrangement as shown.

A swivel joint, to which a short pipe with strainer is fixed. The swivel joint could be simple threaded joint because the arc of operation would be less than 90 deg. This joint should be loose enough to allow a twist on either direction (and strong enough to hold the attached weights). This arrangement could be down while in operation and could be raised up for cleaning the strainer.

And, regarding the mesh size: it depends upon the floating particle size. You may start with smaller mesh, may be you said 2mm and go for bigger, if the cleaning frequency troubles you. Also consider the biggest particle size that can be tolerated down the line.

If this plan sounds good, consider to incorporate the good points mentioned in post # 5 by TonyS.

Thank you 'yesyen'

Great idea and worth to study the possibility of such arrangement

Is it used in practice?

For cleaning the strainer does it need to be in vertical position?

Not exactly same but similar one which I improvised for your context. This is not a complicated idea, should work well.

Cleaning need not be done in vertical position. It can be any convenient position where most of the surface is accessible.

I would even suggest some quick coupling (like breech-lock, Chicago coupling etc) between pipe and strainer which would allow removing the strainer for cleaning to any convenient place. If time is critical a spare strainer can be kept while the removed is taken for cleaning.

Should you require a detailed design for this proposal, I'm glad to do it since you will be using my idea. It is not righted, its all yours...

I am pleased that you are sharing new ideas with people here

I will be grateful if you can work out the detailed design

of course all credit goes to you

Thanks

'yesyen':

Can you please advise if this is suitable swivel joint for my application?

Yes, this would work. But this kind of plastic fitting looks like that of small sized tubing, right? Are they are available in big size for your transfer pipe size?

Fine, let's fix it together.

Can you give the following dimensions with reference to the sketches below…

D1 = ?

D2 = ?

TP = Transfer Pipe: What material? Size? Can welding possible (at least tack/stitch welding possible) in site? Or, a new pipe piece be re-installed?

Top View:

L1 = ?

L2 = ?

B1 = ?

B2 = ?

Power engine,
Have you thought about the health and safety aspects of this? At some point the strainer is going to have to be removed for cleaning. Who is going to be the poor fool unbolting it in a tank full of sh1t? Cut the plastic pipe flush to the wall and make a frame that the strainer can be slid in and out of from the top.

TonyS:

Cleaning can be done from the ground with water jet since this is open tank

However i am not sure if this method is effective to completely remove the dirt

trapped in the strainer.