Please call AAAmachine, Inc. at 800-996-0070
for any air knocker questions. E-mail
--- AIR KNOCKER (Impactor)
Pdf brochure DOWNLOAD (Air Knocker - Explanation of Air Knocker/Opecon, 1-page 445kb)
Pdf brochure DOWNLOAD (Air Knocker - Example for use, 2-page 147kb)
Pdf brochure DOWNLOAD (Air Knocker - Reference of Installation, 2-page 201kb)
Pdf brochure DOWNLOAD (Air Knocker - Relay knocker, Stainless knocker, Control, 2-page 255kb)
Pdf Questionnaire DOWNLOAD (Exen survey for Flow Aid System, 1-page 103kb) ExcelQuestionnaire DOWNLOAD (Exen survey for Flow Aid System, 1-page 33kb)
Click for details (direct type)
Click for details
(Indirect type)
<Comparison between air knocker and piston vibrator>
Multiple Air Knocker principle and features
Compressed air is introduced to the air tank of the Knocker and
the piston momentarily works by opening/closing the inside valve
using three-way valve. The generated impact will avoid the powder
sticking/clogging problem at hoppers. This system eliminates the
manual hammering work. Fully automatic operation is possible.
Hammering strength is adjustable by changing pressure.
Multiple knockers can be installed by single valve action.
Tubing for Multiple Air Knocker installation
When multiple installation, compressed air is supplied through three-way
valve to tank-center port of the knocker. And from the next sub port, another
tube is connected to the next air knocker main port. And the 3rd and more
knocker can be connected in the same way. All the air knockers work almost
at the same time (very short time lag). Multiple air knocker can be operated
by single valve action, which decreases the initial cost. Maximum quantity
(3 to 10 units) depends on the control and the three-way valve. (Patented)
EXAMPLE OF TYPICAL FLOW AID
SYSTEM INSTALLATION
Air knocker installation example
TROUBLE
PHENOMENON
.
BRIDGING Bridging occurs when materials cling to the wall or compact above the discharge
opening of the lower part in the hopper, and the flow of materials in the
upper part is interrupted.
RATHOLING
Rat holing occurs
when materials flow only above the exit, and form a tube that leaves
the hopper filled with "dead" materials, which will not move.
.
ARCHING
Arching occurs when materials in the lower part of the hopper flow out from the discharge opening, and an arch strong enough to support the entire head load in the hopper is formed
ADHERENCE TO WALL
Clinging
materials and also materials easily influenced by the moisture and
the temperature adhere to the wall and refuse to
flow.
RKV30PA
RKV40PA
RKV60PA
RKV80PA
RKV100PA
SPECIFICATIONS
Model
Working Pressure
(MPa)
Percussion Cycle
(times/min)
Air Consumption
(Nl/time)
Percussion Energy
(N-m)
Impulsive Force
Total Weight
(kg)
(kg-m/s)
Suitable hammer (Ibs)
RKV30PA
0.3-0.7
1-60
0.05-0.13
5.49-13.1
1.70-2.60
below 1.0
1.3
RKV40PA
0.15-0.37
9.22-22.3
2.86-4.42
1.0-1.5
3.4
RKV60PA
0.33-0.77
20.60-49.0
6.80-10.50
1.5-3.0
8.8
RKV80PA
0.60-1.40
45.10-109.0
15.00-23.30
3.0-8.0
13.7
RKV100PA
0.98-2.28
82.40-201.0
28.70-44.50
6.0-15.0
30.8
DIMENSIONS CHART(mm)
Model
A
C
D
G
H
I
J
K
L
M
N
RKV30PA
66
70
8
1/8
95
(25)
8.5
55
8
35
27.2
RKV40PA
86
95
12
140
12.5
70
13
60
34.0
RKV60PA
115
138
14
183
14.5
110
15
80
76.3
RKV80PA
146
148
16
1/4
222
(28)
17.0
120
18
90
RKV100PA
175
208
20
270
21.0
170
23
115
114.3
INSTALLATION METHOD
(1)
When wall thickness in the installation part is thin, prepare the
reinforcing plate of 3 2 to 6 mm thick, and weld the center and
around the whole reinforcing plate in front fillet welding to the
hopper for transmitting percussion force more efficiently.
(2)
Weld around the whole circumference of the base.
(3) For the
model larger than RKV60, weld accessory reinforcing rib usually
necessary for RKV30P and 40P.
(4) Tighten the body thoroughly,
using accessory bolt, spring washer, and hard lock nut.
(5)
Secure the knocker by suspending with wire rope to prevent the
knocker from dropping.
CAUTION ON
WELDING
When operating, considerable impact is given to welds. When welding, pad as much as possible to eliminate damage, which may be caused.
REINFORCING
PLATE
DIMENSIONS
Model
Square
Plate
Round
Plate
RKV30PA
150*150 mm, t3.2
150 mm dia. t3.2
RKV40PA
200*200 mm, t3.2
200 mm dia. t3.2
RKV60PA
300*300 mm, t4.5
300 mm dia. t4.5
RKV80PA
400*400 mm, t4.5
400 mm dia. t4.5
RKV100PA
500*500 mm, t6.0
500 mm dia. t6.0
Manufactured by Exen Corporation 1-7-13, Hamamatsucho, Minato-ku, Tokyo 105-0013 Japan
Tel: +81-3-3434-8455, Fax: +81-3-3434-1658, E-mail
Distributed by Moritani America Inc.
300 Park Boulevard Itasca, IL 60143 USA E-mail
This is AAAmachine, Inc. web site. http://www.aaamachine.com
--- AIR KNOCKER (Impactor)
brochure DOWNLOAD (Air Knocker - Explanation of Air Knocker/Opecon, 1-page 445kb)
Questionnaire DOWNLOAD (Exen survey for Flow Aid System, 1-page 33kb)
.
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