An indirect ignition preheating system

Abstract

The invention discloses an indirect ignition preheating system. The interior of the gas supply main pipe is used to transport combustible gas, and the flame injectors for spraying gas are arranged at intervals on the gas supply main pipe. After the flame injector is ignited, the flame sprayed is used to The corresponding structure is preheated; the ignition auxiliary pipe is made of a conductive pipe with a diameter smaller than the main gas supply pipe, which can transmit electric sparks and is used to transport combustible gas inside; the ignition section of the ignition auxiliary pipe is arranged side by side with the flame injector, and The corresponding flame injector on the combustion section is provided with an ignition injection hole for injecting gas outward; the igniter is close to the secondary ignition pipe and can generate an electric spark, and the gas ejected from the secondary ignition pipe is ignited by the electric spark, and passed through an igniter All the injection holes on all the ignition sub-pipes are ignited, and the flame ejected from the injection holes further ignites the flamethrower, thereby indirectly igniting the flamethrower, so that multiple flamethrowers are ignited synchronously, and the ignition efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of ignition equipment, and further relates to an indirect ignition preheating system. Background technique [0002] When low-alloy high-strength steel plates are used for hydraulic support structural parts, there is often a preheating requirement, that is, the welding parts and surrounding areas should be heated to 100-200 °C before welding, and then start welding. Preheating can effectively prevent welding cracks and deformation. Common preheating methods for structural parts include furnace preheating and flame preheating. Furnace preheating is suitable for overall preheating of structural parts. Flame preheating uses a single-head preheating torch. The structural parts are not heated uniformly, and the production efficiency is low. Overheating will also cause coarse internal grain structure and poor welding effect. [0003] Commonly used preheating torches are used alone, and there are a large number of...

AI Technical Summary

Problems solved by technology

Common preheating methods for structural parts include furnace preheating and flame preheating. Furnace preheating is suitable for overall preheating of structural parts. Flame preheating uses a single-head preheating torch. The structural parts are heated unevenly, and the production efficiency is low. Overheating will also cause coarse internal grain structure and poor welding effect

[0003] Commonly used preheating torches are used alone, and there are a large number of flame nozzles along the length of the pipeline that transports combustible gas. The traditional ignition method needs to ignite each nozzle one by one, resulting in low ignition efficiency and unable to achieve synchronous ignition. Thermal efficiency

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