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Home > Bomb Disposal Tool: Pipe Bomb Remote De-Capper > REMOTELY OPERATED PIPE BOMB DE-CAPPER

REMOTELY OPERATED PIPE BOMB DE-CAPPER

REMOTELY OPERATED PIPE BOMB DE-CAPPER

REMOTELY OPERATED PIPE BOMB DE-CAPPER
Pipe Bomb Decapper On Mobile Stand Close Up Of The Jaws Of The Decapper
Securesearch, Inc., completed two years of research and development to produce a remotely operated tool for bomb technicians. This machine removes caps up to 2 inches (50mm) in diameter, from steel or plastic pipe bombs made from pipe ranging from 1/2 inch (12mm) to 1-1/2 inches (37mm) in diameter. The de-capper grips the pipe body and locks it in place so it cannot turn. There are three rotating jaws which automatically close down from fully-open to a locked position on the pipe cap. Once locked on, the jaws continue to rotate in a clockwise direction until the cap is fully unthreaded and separated from the pipe body, thus venting the bomb. This operation can be set up by hand and controlled from up to 500 feet (165 meters) away.

The pipe bomb may be brought over to the de-capper by a remote mobile investigator (RMI or robot vehicle), and placed onto the V-block positioning table which has been preset by the operator for the proper diameter of pipe. The operator can determine the pipe diameter with a multi-slotted and marked template, which the RMI can remotely place over the pipe under most circumstances. The diameter can be read back by the operator using the closed circuit TV on the RMI arm. The tool can be operated by one person with limited training.

The de-capper weighs 275 pounds (125 kg). Its dimensions are 32 inches long, 15 inches wide, by 18 inches high (96.5cm X 38cm X 45.5cm). It can be mounted on the bed of a truck, on a small trailer, or we can supply a folding, two-wheeled stand that can be adjusted so that the rotating jaw opening can be raised to 39 inches (114.5cm) above ground level.

The stand itself uses a built-in, hand-cranked scissors jack; fully closed, the top of the stand is 10 inches (25.5cm) above ground level. Cranked fully open, the top of the stand is 28 inches (71cm) above ground level. Note that the de-capper cannot be towed on the stand behind a vehicle, using the wheeled stand as a trailer. However, the de-capper and stand as a locked-together combination, can be towed on a low trailer.

The operator can reverse the direction of rotation of the three jaws. The jaws will lock down with ease on both round end caps that thread over a pipe, and square end plugs that thread into a pipe. A high torque 120 volt motor drives a gear and chain assembly. It is capable of turning up to 500 feet of 1-1/2 inch steel pipe, according to the drive manufacturer. Thus, it is capable of de-capping pipe bombs whose caps have been turn down tight with a pipe wrench or whose threads have been epoxied shut to prevent unscrewing. Pipe and plumbing threads are tapered, being slightly narrower at the start of the cut thread (at the month of the pipe and the mouth of the cap or end of the plug). At the end of the thread cut, the threads are shallower and the uncut part of the pipe where the threads taper off is wider than the rest of the threaded portion.

If you look at a length of threaded plumbing pipe or gas pipe, you can observe that the pipe becomes wider as the threads end. Thus, when the end cap is turned down tight, with a pipe wrench, its threads grip the pipe more firmly the tighter the cap is turned because it is trying to slip over an ever-widening pipe. We have found that it can take 200 foot-pounds of torque, (or more), to overcome the friction at the end of the pipe thread. This is more than the average person can apply with a wrench alone. If the wrench is fitted with a length of pipe over the handle, then the bomber can tighten the cap to 200 foot-pounds or more. Unless you have a remote means of applying this much reverse torque to break the friction seal at the end of the threads, you will not be able to uncap the bomb. And if you try doing it by hand, you risk a detonation! If the pipe bomb detonates on the machine’s V-block bed, only the end cap is actually inside the machine. There is a straight-through hollow passage out the back end of the de-capper which will direct the flying end cap. It is recommended that sand bags or other strong barriers to fragmentation be set up at either end of the decapper. and that the public be evacuated to a distance of at least 2000 feet or about 700 metres.

The jaw speed is variable at two speeds, 16 revolutions per minute, or 45 revolutions per minute. The slower speed produces less sudden torque, and friction is considerably lessened between the threaded parts of the bomb. However, any friction or sparking at the contact points between threads, can initiate a low order detonation; this will depend on type of filler, degree of confinement, strength of sidewalls and threads and other factors. If the bomb has any anti-open or anti-tilt boobytraps inside, it may also detonate while being handled, which is why such bombs should only be handled remotely. An optional automatic pump oiler is available to continuously douse the threads with a stream of oil, reducing friction and chance of detonation.

The V-block bed which holds the pipe bomb, rides in and out on a short track. It is designed to insert one cap into the opening of the de-capper which holds the three jaws, and to stop at the correct position.

By remote means, the pipe bomb may then be released from the de-capper, reversed, and the other cap inserted into the jaw opening for removal. This will vent the pipe bomb at both ends. A robot vehicle can open the de-capper and remove the pipe bomb from the V-block bed.

The de-capper runs on ordinary A.C. line voltage, 110-120 volts; it has a startup requirement of 16 amps (no load) and draws 13 amps in continuous operation. The average pipe cap can be removed in 30-45 seconds at high speed. The machine can also be run from a heavy-duty, gasoline-operated electrical generator in the field.

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Order Sku PBD97816573
 
Price: $8500.00
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