Kurita Sakuganki K.K.

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Tuyere (twyer) exchanger

Tuyere (twyer) exchanger

  • Oil pressure is produced by driving diesel engine, and drive(traveling), tilting, ascent/descent and hammer steering are conducted hydraulically.
  • Air hammer for both forward and backward strike is installed for withdrawal (extraction) reverse strike and tuyere driving forward strike. By using both hydraulic jack and hammer strike, tuyere extraction, driving and inner cold tube extraction can be done easily.
  • Forノロ(?)落とし removal and inner surface shaving after extracting tuyere, the surface is shaved with strike by turning the small air hammer along the circumference. Hammer is air-driven, and rotation is done hydraulically.
  • If the engine is started with engine operation panel, the following operation is done entirely by looking at the sites on the wired control panel.
  • 2 lamps are installed on the top and bottom, allowing for easy operation in the dark.
  • Extraction, driving, inner cold tube removal, and inner surface shaving rod are set with 1 push-off pin, allowing for easy installation and removal.
  • Rubber crawler facilitates pivot turn, change of direction, and small repositioning. The engine meets gas emission regulation by the Ministry of Construction.

Tuyere extraction and transport

Tuyere extraction and transport photo 1 Install extraction (drawing) rod, and withdraw tuyure with hydraulic jack and forward/backward dual purpose air hammer. Extracted tuyure can be kept on the rod for transport.

Tuyere inner surface (face) shaving

Tuyere extraction and transport Photo 2
Install inner surface shaving rod and shave inner surface in order to removeノロ落し after extracting tuyere and format tuyere insertion site. Shaving machine moves back and forth and revolves along the circumference as it shaves the surface.

Tuyere driving set / Tuyere driving rod

Install (mount) tuyere driving rod and position new tuyere at the tip, and drive tuyere with forward strike of air hammer.
Tuyere extraction and transport Photo 3

Inner cold tube removal / Inner cold tube extraction rod

Install inner surface shaving machine, and crush (grind) fire-resistant material in hooking part of extraction rod. Next, install inner cold tube extraction rod and insert it in the tube, so that it hits the inside of the tube of hooking part and come forward引込前方. Here, open the hooking part at the tip of inner cold tube, and extract it with hydraulic jack and reverse strike of hammer.
Tuyere extraction and transport Photo 4

Inner cold tube removal / inner cold tube driving rod

Install inner cold tube driving rod, and set inner cold tube preset in tuyere at the tip of rod. Position it and drive it with forward strike of hammer.
Tuyere extraction and transport Photo 5


Overall Specification

Weight 2,870kg
Overall width 1,170mm
Overall length 3,674mm
Hammer stroke 850mm
Overall height 1,380mm
Diesel engine output 17PS
Oil pressure 21MPa
Oil content 25ℓ / min
Striking machine model KD-4H2
Strike air consumption 5~7M m³
Travelling speed 15m / min
Rubber crawler width 260mm
Gradability 20°

Rod specification

  Tuyere extraction rod Tuyere driving rod Inner cold tube extraction rod Inner cold tube driving rod
Weight 90kg 108kg 145kg 190kg
Overall length 2,020mm 2,094mm 1,850mm 2,090mm
Diameter Φ80mm Φ80mm Φ80mm Φ80mm

Tuyere inner surface shaving machine

Model R-56A
Weight 80kg
Overall length 1,785mm
Diameter Φ80mm
Air consumption 1.5N m³ / min
Number of strikes 2,000blow / min
Hydraulic motor J32EBD

Strike hammer

Model KD-4H2
Weight 270kg
Overall length 1,390mm
Forward striking force 28kg / m
Backward striking force 28kg / m
Air consumption 5~7M m³
Number of strikes 2,000blow / min
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