Rotary kiln residual refractory brick breaking device and method capable of accurately controlling breaking depth

Abstract

The invention discloses a rotary kiln residual refractory brick breaking device and method capable of accurately controlling breaking depth, and belongs to the technical field of breaking equipment. The device comprises a rack system, a breaking system and a control system, and the device is characterized in that a spindle motor drives a drill bit to rotate, meanwhile, a handle is held by a hand to conduct feeding motion, when the drill bit penetrates through residual refractory bricks to make contact with a rotary kiln steel kiln body, a circuit in the control system forms a closed loop, an alarm lamp flickers to give an alarm, voltages generated at the two ends drive a controller to work to switch on the circuit direction of the spindle motor, and the motor rotates reversely, so that thedrill bit slowly retreats under the driving of external force. According to the device and the method, the feeding amount of the drill bit is accurately controlled through a weak current system, andthe drill bit is prevented from damaging the steel kiln body in the breaking process, so that the rotary kiln body is effectively protected against damage by the drill bit in the maintenance process,and the service life of the kiln body is greatly prolonged.

Description

Technical field: [0001] The invention belongs to the technical field of demolition equipment, in particular to a device and method for demolishing residual refractory bricks of a rotary kiln capable of precisely controlling the depth of demolition. The invention uses a weak current circuit to control the drive reversal to control the demolition depth of the remaining refractory bricks, prevent the demolition tools from damaging the steel kiln body, and protect the expensive kiln body. Background technique: [0002] During the calcination process of cement and other clinker, the temperature of the material is as high as 1100°C, and the temperature of the gas in the kiln is much higher than the temperature of the material. The steel kiln body cannot withstand such a high temperature. In order to protect the kiln body from the heat damage of high-temperature materials and gas in the kiln, the kiln lining is usually formed by laying a layer of refractory bricks that are poor con...

AI Technical Summary

Problems solved by technology

In the kiln demolition environment, not only the noise is loud, but also the impact hammer core is difficult to control

The surface of some residual refractory bricks has produced micro-cracks under the impact of the drill rod, but it is not easy to observe, and still receives the subsequent impact of the drill rod, so that the drill rod will stall, and its tip will inevitably hit the surface of the kiln body, causing Damage occurs on the surface of the kiln body, and then the hammer core can be impacted to stop the blow

During the demolition process, the refractory bricks at different positions have different degrees of wear and different strengths. It is difficult to adjust the impact force of the drill rod precisely according to the difference of the remaining refractory bricks, which also greatly increases the impact of the drill rod on the kiln body. chance of injury

These damage points, under the action of cyclic thermal stress and mechanical stress, are likely to become the source of fatigue cracks. The micro-cracks continue to grow under the action of cyclic stress, and eventually cause the kiln body to rupture and become unusable, causing immeasurable damage to the enterprise. economic loss

Therefore, precisely because it is difficult to accurately control the hydraulic striking force and the depth of demolition, enterprises are generally very cautious about adopting mechanized demolition methods. In addition, the diameter of the kiln body that is suitable for mechanized demolition is relatively large, and there are actually many There are many kilns with small diameters, and large machinery cannot drive in, and mechanized operations cannot be carried out

Manual demolition is to rely on workers to hold crowbars and other tools to demolish residual refractory bricks. Since the surface materials of refractory bricks are consolidated together during the calcination process, demolition is difficult, labor-intensive, and the working environment is harsh, so the demolition efficiency is not high. , resulting in a long maintenance time for the kiln body, which directly affects the economic benefits of the enterprise

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