Anti-falling brake device for oxygen lance

Abstract

The invention relates to an anti-falling brake device for an oxygen lance. The device consists of a guide rail, an inner cam, an outer cam, a guide wheel, a short connecting rod, a gasket, a long connecting rod, a pulley connecting shaft, a pulley, a pulley frame, a push rod, a spring dabber, a connecting rod connecting shaft, an upper spring seat, a spring, a lower spring seat, a transverse connecting rod, a trolley, an inner cam connecting shaft and an outer cam connecting shaft. According to the anti-falling brake device provided by the invention, the curve of the working face of the cam meets the self-locking condition. As long as initial contact is formed between the surface of the cam and the guide rail under the effect of the spring force, the cam is driven by the frictional force to be further compressed and finally locked. The double cams are used for clamping and are symmetrical in movement and consistent in position of acting points. The horizontal actions are cancelled out, so that the guide rail can be effectively prevented from deformation in the brake process. A connecting rod mechanism is rigidly connected, and the cam mechanism is strictly at an opened state under the tightened state of a steel wire rope, so that mis-operation can be effectively prevented. The connecting rod mechanism is rigidly connected, and the cams can be automatically loosened by re-tightening the steel wire rope at the brake state.

Description

technical field [0001] The invention relates to an oxygen lance anti-drop brake device, which is mainly used for the anti-drop brake of the oxygen lance lifting mechanism (trolley) in converter steelmaking, and belongs to the technical field of steelmaking equipment. [0002] Background technique [0003] During the smelting process, the working environment of the oxygen lance lifting mechanism is extremely harsh, and frequent movements are required to drive the oxygen lance up or down. During the up and down movement of the oxygen lance, abnormal jamming (such as foreign matter on the nitrogen seal) is likely to cause the steel wire rope to loosen. When it is tight, it is easy to break due to excessive impact load, resulting in a falling gun accident. The falling gun accident is a major safety accident. On the one hand, once the oxygen lance falls into the molten steel, if it explodes, the consequences will be disastrous; secondly, the oxygen lance trolley and other mecha...

AI Technical Summary

Problems solved by technology

[0008]1. The main reason for the inability to brake accurately is that the transmission mechanism is not rigidly connected, and it is easy to malfunction and affect the smooth progress of production. Therefore, in order to make the production smooth The initial gap is often adjusted very large, so that once the wire rope is really loose, the braking mechanism cannot brake in time because the required action stroke is too long;

[0009]2. When braking, the force on the guide rail is asymmetrical, which may easily cause deformation of the guide rail, although some structures use a combination of dynamic and static brake blocks (arms) It can alleviate the asymmetry of the force on the guide rail to a certain extent, but it cannot fundamentally eliminate the asymmetry of the force on the guide rail;

[0010]3. Once braked, it is not easy to release. The reason for this phenomenon is mostly related to the non-rigid connection of the brake structure. open devices, but most of them have defects such as requiring manual on-site operation or requiring additional power sources;

[0011]4. Insufficient braking capacity: some braking devices have no problem in the braking principle, but the specific structure design lacks accurate calculation, so that the structure can provide The braking force is insufficient, or the braking mechanism is damaged due to insufficient strength during the braking process;

[0012]5. The over-action of the arm brake mechanism fails. Under the conditions of deformation of the guide rail or unreasonable stroke setting, the arm brake mechanism is prone to arm rotation. The rotation angle is too large, and the point exceeds the maximum pressure point and turns up, resulting in braking failure.

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