Air Cannon CNU-M SERIE
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- Solves flow problems of materials.
- Simple, efficient, noiseless and economic.
- Safety for the staff.
- Whole capacity of the deposit is useful.
- Membrane shot as the only moving part.
- System patented.
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Description
The CNU-M air cannon is a system to solve flow problems of bulk materials such as ash, slag, lime, cement, coal, ore, clay, salts, sawdust, shavings, cuttings, flakes, powder, soya, livestock...
In a fraction of a second the CNU-M air cannon blasts a volume of pressurised air through a broad section pipe, until it reaches the critical areas of the silo where the bulk material has become blocked. This accumulated energy, by being suddenly released, exceeds the adherence friction, and as a result of the airjet, the blocked material again flows normally by gravity, with little sliding friction.
The CNU-M air cannon is a safe method, as the valve used does not produce any sparks or flame. Besides of this, other fluids can be used, as the nitrogen. On the other hand, the structure does not suffer, as the energy is applied directly to the material. The design reduces the backward motion to the minimum, avoiding any possibility of stress on the structure.
Applications
The CNU-M air cannon can be used in concrete, steel, wooden or plastic silos, tanks and hoppers. Any shape, form or inclination can be valid as long as the material to be fed is blocked.
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Clinging material
The material clings to the wall structure. |
Bridging
The material tends to form a bridge in the central area. |
Chimney
Hoppers often become obstructed with settled material. |
Dome
The material blocks the upper part of the hopper. |
Functioning
The CNU-M air cannon works with normal air pressure lines, between 2 and 10 kg/cm2. It is highly recommended that the used air is clean and dry. The effectiveness is increased with the pressure. Normally a pressure between 2 and 6 kg/cm2 is enough..
The maximum drive frequency allowed to activate the air cannon is 12 shots per minute, eventhough a few shots per day are enough.
How the CNU-M air cannon works
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| To fill the accumulation chamber D with air, the airline is connected through the valve V |
The air presses membrane M against the edges of pipe T, closing chamber D.D is filled with air through the holes of the membrane. |
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| The air passing through the holes in the membrane fills the chamber D until pressure compensation is reached.
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When closing valve V, the air contained in chamber C leaves through the electric valve, opening communication between chamber D and pipe T. The air leaves through T, expanding in the form of an explosion.
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Installation
The 3/4" quick exhaust valve V -included in the scope of the supply- has to be installed in the outlet of the air cannon. This exhaust valve has to be commanded by another valve, with a diameter of at least 3/8".
The air cannon is secured to the tank or hopper with a few accessory pipe elements and is connected to the air pressure network through a control valve sometimes combined with a full automatic pneumatic drive circuit.
The control valve can be a 3/2-way valve, a 5/2-way valve; electrically, pneumatically or manually commanded. It can be connected to the exhaust valve directly or through a rigid tube; in this case, the minimum tube diameter must be 10 mm and the maximum length of 1,5 m.
  
Characteristics
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Type |
Vol.* |
A |
B |
C |
D |
E |
F |
G |
H |
I |
Flange |
ø |
Weight |
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l |
mm |
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mm |
kg |
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CNU-M 0 |
8 |
76,6 |
200 |
320 |
165 |
85 |
125 |
3/4" |
65 |
470 |
4 drills |
18 |
20 |
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CNU-M 1 |
16 |
76,6 |
200 |
600 |
165 |
85 |
125 |
3/4" |
65 |
750 |
4 " |
18 |
28 |
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CNU-M 2 |
45 |
114,8 |
300 |
700 |
220 |
95 |
180 |
3/4" |
75 |
870 |
8 " |
18 |
48 |
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CNU-M 3 |
138 |
114,8 |
500 |
750 |
220 |
95 |
180 |
3/4" |
75 |
920 |
8 " |
18 |
74 |
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CNU-M 4 |
323 |
165,6 |
600 |
1200 |
285 |
120 |
240 |
3/4" |
85 |
1405 |
8 " |
23 |
155 |
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CNU-M 5 |
630 |
165,6 |
750 |
1500 |
285 |
120 |
240 |
3/4" |
85 |
1705 |
8 " |
23 |
200 |
* Air volume with 1 kg/cm2 pressure.
Construction
The only moving part in the CNU-M air cannon is a membrane accessible from the outside without dismountling the unit. This membrane gives the airtightness to the air cannon.
Safety against accidents
The CNU-M air cannons fit all the safety standards for tanks under pressure and are made following the Directives for simple recipients under pressure 87/404/CE.
Questionary
In case of need, there is available a questionnary to study the required parameters in order to determine the type of cannon and the units to be installed in the silo.
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