Skirting receiving feed from downstream must always be set in relief. Meaning the leading edge is closer to the belt than the trailing edge. If this is reverse you are asking for trouble with trapped material.

Flaring the inlet to the skirt is also advisable to prevent plowing off of product at the inlet to the skirt.

Here is a typical design that we use.

Attachments

skirt (PDF)

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Thanks a lot Mr.Gary.

Is there any suggestion for skirting installed at reversible conveyors ?

Regards, ■

To hope to prevent spillage with multiple loading points you must provide full length skirts along the whole loading length. Like the books say! It is pointless to accept the spreading of burden & subsequently try to regather the material with profiled skirts.

Why?

Because the energy expended in lifting the spread material & pushing it sideways is repeated at every subsequent material addition, grows accordingly & places additional load on the sealing rubber. Never mind the entrapment issue.

If you want to reverse a belt under multiple loading points you must simply provide skirts along the full loading length, as before. ■

full length skirt will require a much closer look at the HP required to over come the friction generated by the skirting material. ■

Originally Posted by Gary Blenkhorn

full length skirt will require a much closer look at the HP required to over come the friction generated by the skirting material.

I must agree with this statement based on bitter experience!

Best to try and set up a test to measure the skirt friction than rely on figures in a book. ■

In one of our conveyors the distance between two feeding points is more than 50 metres.

We may need a better solution.

Regards, ■

My observation is that your plant has a conveyor fed by 6 feeders with a gap of 50m between & now, eventually, it has been decided to look at the skirting issue. It's a bit overdue!! Who was responsible for design checking? Your belt will be a lifetime source of trouble & I anticipate more thrilling episodes.

You need full length skirts & that's it. You say that full length skirts will damage the belt due to entrapment. not true, skirts are supposed to stop entrapment, which you already have. You admit that flaring the local skirts does not prevent entrapment (it actually increases entrapment) but you are reluctant to do the job properly. Obviously more thought should have gone into loading a belt travelling at 8.4 m/s at 6 places with 50m gaps.■

For the multiple location of receiving chutes, can we use different angles of troughing frames?

For example, the troughing angle of carrying frames may be 45 degrees below the receiving chutes, but at other places it can be 35 degrees. Will it cause any significant ill effects on the conveyor belt?

Regards, ■