Blast furnace loading winch

Composition: car body, cowl and running

Effective volume: 0.7 ~ 0.8 of geometric volume

Lining connection method: countersunk screw and car body connection

Introduction

The blast furnace loading winch is composed of three parts: the car body, the cowl and the running. When the shape and geometric size of the feed car are fixed, its effective volume is related to the inclination of the running track in the feed pit, the position of the coke and ore hopper gate, and the opening size. -The effective volume of the general feeder can be 0.7 ~ 0.8 of its geometric volume, the higher value for large blast furnaces and the lower value for small blast furnaces. The inner wall of the material car is equipped with a wear-resistant lining made of manganese steel or white cast iron. In order to facilitate unloading and easy replacement, the lining is connected to the car body with countersunk screws. The junction angle formed by the lining board is rounded to prevent the charge from accumulating at the junction. The rear wheels of the feed truck are double treads, and the rim is between the two treads. When the feed truck runs on the linear guide rail on the inclined bridge, the inner tread surface of the rear wheel contacts the guide rail. When entering the furnace roof discharge curve rail, the outer tread surface of the rear wheel contacts the auxiliary guide rail of the discharge rail, while the inner tread surface does not contact the guide rail.

use

The material car hoist of large and medium-sized blast furnaces is driven by a DC motor. The theoretical speed and acceleration of the material car used in the design are used. When the winch was just started, the heavy-duty truck located in the pit of the material truck began to rise, and the empty material truck began to descend from the extreme position of the furnace unloading track. In order to prevent the steel rope of the empty material truck from slackening, the acceleration of the steel rope winding from the reel should not exceed the acceleration of the steel rope that can be produced when the empty material truck returns, so the acceleration should be smaller at this time, generally a1 = -0.2 ~ 0.4m / s2. In the period of t2, in order to transition to speed in a shorter time, the acceleration should be larger, generally a2 = 0.4 ~ 0.8m / s2, but the speed of the steel rope should not be controlled when the empty material truck leaves the unloading curved track not to exceed 1.5 ~ l .6m / s. During the period of t3, the material truck is transported at a speed, and the large blast furnace generally takes 3 ~ 4m / s. During time t4, it is the deceleration of the heavy-duty truck before it enters the unloading guide rail, generally a4 = (0.4 ~ .8) m / s2, and the traveling speed of the unloading truck in the unloading guide rail area is generally 1.0m / S. The second deceleration is to decelerate the hoisting machine during the period of t6, generally a6 = a4.

working principle

The feeder winch draws two feeders, each walking on the inclined bridge track of the iron making equipment. The two feeders move in opposite directions. The feeder with the charge is going up and the other empty feeder is going down. In order to make the ascending material truck automatically discharge when it reaches the top of the inclined bridge, the material truck track on the top of the inclined bridge is designed into a curved track shape, which is called the main curved track. An auxiliary curved track capable of tipping the material truck is arranged outside the main curved track, and the gauge is wider than the main curved track and is located above the main curved track. When the front wheel of the feed truck moves along the main curved track, the rear wheel transitions to the auxiliary curved track through the wheel surface and continues to rise, so that the rear part of the feed truck is gradually raised. When the front wheel travels to the end of the main track, the feed truck tilts over the front wheel as the center and automatically unloads the material into the furnace receiving hopper. When the hoist is reversed, the empty unloaded vehicle will automatically retreat from the auxiliary curved track due to its own weight, and at the same time another material-loaded vehicle will move along the track on the other side of the inclined bridge.