Numa Champion RC160, Инструкции по уходу и обслуживанию, Страница: 6 / 27

07/16/15 Page 2
MANUFACTURER OF DOWN HOLE HAMMERS AND BITS
Champion
® ®
® ® ®
RC160
FUNCTIONAL DESCRIPTION
1. BACKHEAD
The backhead connects the hammer to the drill rod. Backheads can be manufactured
to be compatible with several reverse circulation drill rod designs. Please contact
your distributor or regional salesperson for more information. Wrench flats are
provided for disassembly.
2. CHECK VALVE SEAT
The check valve seat provides the sealing surface for the check valve and guides the
collection tube.
3. CHECK VALVE
The check valve maintains pressure in the hammer when the air supply has been
shut off. The check valve in the hammer balances the hydrostatic pressure in the
hole thereby preventing contaminants from entering the hammer.
4. CHECK VALVE SPRING
The check valve spring provides tension under the check valve to keep it closed. It
is compressed as the air is turned on.
5. COLLECTION TUBE
The collection tube extends from the backhead to the bit and transfers the collected
drill cuttings to the inner drill pipe of the reverse circulation drill rod. The collection
tube is designed to be easily replaced without removing the backhead from the drill.
6. COLLECTION TUBE HOUSING
The collection tube housing aligns the collection tube. Holes in the collection tube
housing allow the transfer of air to the feed tube assembly.
7. BELLEVILLE WASHERS
Two belleville washers sit between the collection tube housing and the feed tube
housing to keep the feed tube housing tight against the shoulder in the hammer.
8. FEED TUBE HOUSING
The feed tube housing is aligned in the main bore of the hammer. It sits against a
shoulder in the case and is held in position by the backhead, collection tube housing
and belleville washer combination. The feed tube housing locates and aligns the
feed tube.