Air knocker(Direct impact type)

  • Air knocker(Direct impact type)
  • Air knocker(Direct impact type)
  • Air knocker(Direct impact type)
  • Air knocker(Direct impact type)
  • Air knocker(Direct impact type)
  • Air knocker(Direct impact type)
  • Air knocker(Direct impact type)
  • Air knocker(Direct impact type)

Air knocker(Direct impact type)

Direct impact type hammering equipment for expanded applications

This product is used for the following applications:

  • 01Food factory: RKD is used to remove the chocolate from the mold in chocolate factory
  • 02Elimination of adhesion on wall surface in rotary drier
  • 03Removal of extra paint in powder paint
  • 04Prevention of adhesion on wall surface of workpiece for furnace, knocking off of weld spatter, prevention of adhesion on workpiece on mesh in drying furnace
  • 05Used for inscription
  • 06Used for telescope enforcement
  • 07Removal of water on base

Used in the following places:

Features

The Air knocker series (direct impact type) are unique equipment in which the force of compressed air causes the piston to strike the hopper wall surface directly and energetically, which eliminate the adhesion or clogging of powder. In addition, this knocker is excellent in safety and economics because it can be used only by air supply, and it can be used safely for powder that has a characteristic to show adhesion when receiving the centrifugal force. While the indirect impact type strikes the mounted knocker base at a predetermined position, the air knocker is used in wider range of applications on your idea, such as striking the moving object and striking the target with the knocker itself moved. It is also used like the indirect impact type.


Operating principle of Air knocker

1. The compressed air flowed into the knocker is first supplied to the valve chamber to depress the mushroom valve and then is stored in the accumulator.

2. When the three-way valve is actuated to exhaust the air from the valve chamber, the compressed air in the accumulator moves the mushroom valve upward.

3. When the mushroom valve moves, the compressed air in the accumulator depresses the piston energetically, which strikes the base surface. That impact force eliminates the adhesion or blockage of powder.


Achieved miniaturization and weight reduction

Relay knocker RKD-PB has achieved miniaturization while maintaining the same tank capacity as the old model. In addition, the weight has been reduced by changing the cylinder to aluminum die casting.

Air knocker(Direct impact type)

Air knocker impact force can be changed only by adjusting the supply air pressure.

Air knocker(Direct impact type)

Can be operated multiple air knocker units with using relay piping mechanism.

Air knocker(Direct impact type)

ECO-friendly / Oil- free operation

Air knocker(Direct impact type)

Excellent durability and simple structural design

Air knocker(Direct impact type)

World largest class air knocker RKD120P for big hopper, silo and etc. (mining, feed grain, steel works etc.)

Air knocker(Direct impact type)

Wide range Air Knocker models

Air knocker(Direct impact type)

Air knocker installation method

Air knocker(Direct impact type)
Air knocker(Direct impact type)

List of models

 

Model Code Number
RKD30PB 001697000 
RKD40PB 001699000
RKD60PB 001701000
RKD80PA 000694000 
RKD100PA 000695000 
RKD120P(Bolt and nut set) 001691000
RKD120P (Mounting base) 001712000

 

※RKD120P mounting base is sold separately.

Specification

RKD (Normal piping)

Model  Working
Pressure
(MPa)
Stroke
Cycle
(time/min)
Air
Consumption
(L/time) (ANR)
Stroke
Energy
(N・m)
Impulsive Force Weight
(kg)
(kg・m/s) Converts into
Hammer pound
(lb)
RKD30PB 0.3-0.7 1-60 0.05 - 0.13 5.5 - 13.1 1.2 - 1.8 Below 1.0 1.7
RKD40PB 0.15 - 0.37 9.2 - 22.3 2.6 - 4.0 1  -  1.5lb  4.8
RKD60PB 0.33 - 0.77 20.6 - 49.0 6.9 - 10.6 1.5  -  3.0lb  10.7
RKD80PA 0.60 - 1.40 45.1 - 109 15.2 - 23.7 3.0-8.0lb 18.4
RKD100PA 0.98 - 2.28 82.4 - 201 30.0 - 46.9 6.0-15.0lb  35.5
RKD120P 1-6 3.32 - 6.64 131 - 321 52.0 - 84.0 Twice size of
RKV100PA
52.6

(Imperial System)

Model  Working
Pressure
(PSI)
Stroke
Cycle
(time/min)
Air
Consumption
(cf/time)
Stroke
Energy
(lbf・ft)
Impulsive Force Weight
(lb)
(ft・lbf/s) Converts into
Hammer pound
(lb)
RKD30PB 44 - 102  1-60 0.002 - 0.005 4.1 - 9.7 8.7 - 13.0 Below 0.6 3.7
RKD40PB 0.005 - 0.013 6.8 - 16.4 18.8 - 28.9 1.0 - 1.5lb  10.6
RKD60PB 0.012 - 0.027 15.2 - 36.1 49.9 - 76.7 1.5  -  3.0lb  23.6
RKD80PA 0.021-0.049  33.3-80.4 109.9 - 171.4  3.0-8.0lb 40.6
RKD100PA 0.034-0.080  60.8-148.3 217.0 - 339.2 6.0-15.0lb  78.3
RKD120P 1-6 0.117 - 0.234  96.6 - 236.8  376.1 - 607.6  Twice size of
RKV100PA
116

*The reinforcement rib is included in RKD60PB or upper models as standard, and wire and shackle are included in all models as standard.
*The weight includes that of base.
*RKD120P model is not equipped a fall prevention wire to the body. Please be sure to install them before using.
*Mounting base of RKD120P is including reinforcing ribs. Please weld this ribs to the mounting base when using.
*RKD120P mounting base is sold separately.

Dimensions, installation, control panel

Product dimensional drawings

Product dimensional table

Model  φA φC D φE F G H I φJ φK ST L M O
RKD30PB 62 70 8 17 38 Rp1/8 90 (25) 9 55 17 50 100 Rp1/4
RKD40PB 78 95 12 25 55 134 13 70 25 75 150
RKD60PB 105 138 14 35 65 171 15 110 35 90 200 Rp3/8
RKD80PA 146 148 16 47.5 60 Rp1/4 222 (28) 17 120 40 Rp1/2
RKD100PA 175 208 20 54.5 50 270 21 170 50 250 Rp3/4
RKD120P 220 235 21 68 43 326 17.5 198 74 300 2-Rp3/4

(Imperial System)

Model  φA φC D φE F G H I φJ φK ST L M O
RKD30PB 2-7/16 2-3/4 5/16 43/64 1-1/2 Rp1/8 3-47/64 (63/64) 23/64 2-11/64 43/64 1-31/32 3-15/16 Rp1/4
RKD40PB 3-5/64 3-47/64 15/32 63/64 2-11/64 5-9/32 31/64 2-3/4 63/64 2-61/64 5-29/32
RKD60PB 4-9/64 5-7/16 35/64 1-3/8 2-9/16 6-47/64 19/32 4-21/64 1-3/8 3-35/64 7-7/8 Rp3/8
RKD80PA 5-3/4 5-53/64  5/8  1-7/8 2-23/64  Rp1/4 8-47/64  (1-7/64) 43/64 4-23/32 1-37/64 Rp1/2
RKD100PA 6-57/64 8-3/16  25/32 2-9/64 1-31/32 10-5/8 53/64 6 6-11/16 1-31/32 9-27/32 Rp3/4
RKD120P 8-43/64 9-1/4  53/64 2-43/64 1-11/16 12-53/64 11/16  7-51/64 1-27/32 11-13/16  2-Rp3/4

Product dimensional table

(Wire assembly)


Model  φA B
RKD30PB 2 195
RKD40PB 390
RKD60PB 3 465
RKD80PA 430
RKD100PA 4 500

(Chain assembly)


Model     
RKD120P 11 528

Product dimensional table


Model  Circular
reinforcing plate
Square
reinforcing plate
φA B
RKD30PB φ150×t3.2(3) □150×t3.2(3) 20 26
RKD40PB φ200×t3.2(3) □200×t3.2(3) 20 40
RKD60PB φ300×t4.5(4) □300×t4.5(4) 20 45
RKD80PA φ400×t4.5(4) □400×t4.5(4) 25 60
RKD100PA φ500×t6.0(6) □500×t6.0(6) 25 70
RKD120P φ600×t9.0(9) □600×t9.0(9) 30 80

Installation method

Tightening torque table(mm)   Unit: N·m

Nut size M6 M8 M10 M12 M14 M16 M20
Tightening Lower nut 4.8 10.8 20.6 35.3 56.9 84.3 167
 torque (N・m) Upper nut 4.8 7.6 14.4 24.7 39.8 59 117

Tightening torque table(Ibf.ft)

Nut size M6 M8 M10 M12 M14 M16 M20
Tightening Lower nut *3.54 7.97 15.19 26.04 41.97 62.18 123.18
 torque (N・m) Upper nut *3.54 5.61 10.62 18.22 29.36 43.52 86.30
※When fix knocker unit and base with attached bolt, pay attention to the clamp torque.
If the clamp torque is not enough, the bolt may be loosened by percussion of the knocker.

※To prevent fall down, suspend the knocker unit by the suspender wire and the shackle.