CZK - Roznecovač Ro-30

Ro-30 detonator



- pressure, mechanical igniter



It is mainly used for mining railway tracks. It is placed under the heel of the rail or under the basement. The minimum weight of the charge placed under the rail should be about 2.8 kg, the minimum weight under the sleeper at least 9.6 kg. The Ro-30 is activated by lowering the pressure rod by at least 2 mm due to the train passing over the detonator. The deflection of the rail is transmitted by a pressure rod to the friction clutch, which is pressed down and carries the two detents. As soon as the detents drop by 2 mm, the first detent releases the tooth of the counting wheel, this is rotated by half the pitch until the second tooth strikes the second detent. As the rail moves upwards, the pressure rod and the friction clutch are also pushed upwards by their spring, thus raising the detents again, so that the counting wheel rotates the second half of the range and the second tooth rests on the first detent. This procedure is repeated each time the rail is bent, and the counting device releases one pulse at a time. By turning the counting wheel, the inner case with the firing pin moves at the same time. During the last pass, the retaining balls get against the holes in the case, thus they are released and the firing pin is thrown by the firing pin spring onto the match.


The Ro-30 detonator consists of a two-part body through which the outer case passes. In the outer housing, an inner housing is arranged under the compressed spring, provided on its outer surface with a ridge toothing. In the lower part of the inner case there are holes for releasing the retaining balls. The firing pin held in the striking position by the retaining balls is housed in the inner housing under the compressed spring of the firing pin. The striker shaft is led out of the housing and provided with a scale indicating the number of wheel passes to which the igniter is set. Furthermore, the striker shaft is provided with a safety pin. The firing pin device (firing pin, retaining balls, firing pin spring) is operated in such a way that the teeth of the pinion, which is firmly connected to the counting wheel, which has 30 teeth on its circumference, fit into the ridge toothing of the inner housing. The movement of the wheel is limited by two detents. The detents are mounted on a friction clutch controlled by a spring and a pressure rod, which transmits the movement from the rail to the igniter.


Detonators that cannot be secured with safety pins must not be de-adjusted and must be destroyed on site. Ro-30 detonators are packed in 2 pieces in a cardboard box together with two pressure rods and two wooden pads. Cardboard boxes with detonators are stored in 20 pieces in wooden boxes, so there are 40 detonators in one box.



Source: CV EOD Nováky
Photo: Custom

Jinak řečeno, ten, kdo použije rozněcovač typu RO-30, může ovlivnit, pod kterou částí vlaku (technicky pod kolikátým kolem a vagónem) má nálož vybuchnout.
Použití rozněcovače není vázáno výhradně na železnici, může být použit/uložen také na mostní konstrukci pod mostovku. Opět platí možnost ovlivnění "počtu průjezdů" do iniciace nálože.


Zdroj: vlastní zkušenosti ze služby

Zdroj : Žen-29-2 Miny a roznecovače - predpis ČSLA Praha 1987