Combustion jet cutter used for steel structure member cutting

Abstract

The invention discloses a combustion jet cutter used for steel structure member cutting. The combustion jet cutter consists of a jet cutter bottom, primer, a shell case, ignition agent, cutting agent and a nozzle, wherein thermite is based on plain thermit in the cutting agent; the plain thermit roughly accounts for 65-85wt% of the cutting agent; gas-forming agent is based on potassium nitrate which roughly accounts for 5-25wt% of the cutting agent; and slagging constituent and alloying agent roughly account for 7-20wt% of the cutting agent. During cutting, the combustion jet cutter is filled into a cutting gun, the cutting gun is held with a hand to aim at a cutting part, the jet cutter primer is triggered, inner ignition agent the jet cutter is ignited by the primer, the cutting agent is ignited by the ignition agent to generate high-temperature metallurgical melt and high-pressure gas, and a product is injected after being subjected to energy-gathering compression by the nozzle to locally melt the steel structure member so as to realize cutting. The jet cutter is mainly used for the quick thermal cutting and the underwater cutting of various steel structure members.

Description

technical field [0001] The invention relates to the field of emergency cutting, in particular to an incendiary cutting bomb which uses a solid cutting agent to burn and cut steel structural parts. Background technique [0002] Emergency cutting is an important technology for emergency installation, repair and demolition of field engineering facilities and equipment, and it is also an indispensable technology for military battlefield repairs. Statistics show that equipment parts are stuck, broken, perforated and other damages in the field or on the battlefield, which affect the performance of the equipment. Most of them need to be quickly solved by emergency cutting. In earthquake, snow disaster, landslide, shipwreck and other disaster rescues and daily fire rescue, there is an urgent need for a portable and safe emergency cutting method. [0003] At present, the commonly used thermal cutting methods in field repairs are plasma cutting or gas cutting. Plasma cutting is a th...

AI Technical Summary

Problems solved by technology

Although this method can burn through the cutting metal without power supply, gas source and equipment, the jet stream produced by the combustion of the cutting pen (rod) has low temperature, low jet velocity, low energy density, large heat loss, and oxygen-containing Due to the low quantity and other reasons, the metal cutting efficiency is low, the thickness is thin, the incision width is large and irregular, etc., which are difficult to overcome.

Images