CN111485054A

CN111485054A - Hook type oxygen lance anti-falling device

Info

Publication number: CN111485054A
Application number: CN201910077088.XA
Authority: CN
Inventors: 刘克
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-01-27
Filing date: 2019-01-27
Publication date: 2020-08-04

Abstract

A hook type oxygen lance anti-falling device used for preventing a lifting mechanism of a converter steel-making oxygen lance from falling. It comprises a falling signal transmission mechanism, a hook and a buffer brake mechanism. The falling signal transmission mechanism comprises a lever mechanism, and the buffering brake mechanism comprises an elastic component. The falling signal transmission mechanism is connected with the oxygen lance trolley hanging mechanism and is simultaneously contacted with the hook, and the hook is connected with the buffer braking mechanism. When the oxygen lance lifting steel wire rope is broken, an oxygen lance trolley hanging mechanism on the oxygen lance trolley transmits a falling signal to the hook so that the hook is hung on the arresting rod to achieve the effect of preventing the oxygen lance from falling; after the oxygen lance hoisting steel wire rope is repaired, the braking mechanism is completely reset after the braking process is finished, and normal production activities can be carried out.

Description

Hook type oxygen lance anti-falling device

Technical Field

The invention relates to an oxygen lance anti-falling device, which is mainly used for preventing falling of a lifting mechanism of an oxygen lance for converter steelmaking. Belongs to the technical field of steel-making equipment.

Background

At present, the oxygen lance mechanism of the converter in China still stays at the birth stage of converter steelmaking, and during the smelting process, the gun falling accident is often caused by the breakage of an oxygen lance lifting steel wire rope. The total weight of the oxygen lance and the accessory mechanism is about 2.5 tons, the falling height is about 10 meters, the oxygen lance after falling is directly inserted into the bottom of the furnace and is soaked in molten steel, and if the oxygen lance is damaged, high-pressure water in the lance can leak out and the molten steel can explode violently, which causes inestimable loss. Secondly, the huge impact force of falling easily causes the breakage of the high-pressure water pipe and the high-pressure oxygen pipe, and can cause serious secondary accidents. Thirdly, the oxygen lance trolley and other mechanisms can be damaged in the falling process. The gun drop event is a significant warning event.

The prior art has two sets of devices for preventing the falling of the oxygen lance for converter steelmaking; firstly, two sets of steel wire ropes are adopted, and one steel wire rope is broken and the other steel wire rope is reserved; however, from the design point of view, it seems to be very safe, but in the actual production process, because the oxygen lance carriage is high in position and large in moving range, and a large amount of smoke and dust are generated in the production process, the oxygen lance carriage becomes a blind area for monitoring, and many manufacturers adopt a steel wire rope sensor for monitoring, but the actual effect is not ideal. Only can alarm after the fact, and can not prevent in advance.

Secondly, an oxygen lance trolley falling prevention device is adopted; after a steel wire rope of a lifting oxygen lance is broken, a wedge iron is inserted between an oxygen lance trolley and an oxygen lance upright post by utilizing a spring principle (through the resetting process of a fixed pulley of the oxygen lance trolley) to stop the oxygen lance trolley from sliding downwards, and then the aim of preventing the lance from falling is achieved. But has great defect in design, the wedge plugging degree can not be controlled and adjusted, if the wedge plugging degree is too tight, the wedge plugging degree can be blocked in the normal smelting process frequently to influence production, and if the wedge plugging degree is too loose, the anti-falling of the oxygen lance trolley can not be realized. However, during the production process of steel making, a large amount of metal dust and graphite powder are generated and become lubricants of the wedge of the lance falling prevention system, and the aim of achieving braking is almost impossible under the severe environment.

However, once the oxygen lance falls, the original oxygen lance anti-falling device is almost damaged and is extremely difficult to repair.

Disclosure of Invention

The invention aims to overcome the defects and provide a safe and reliable oxygen lance anti-falling device.

The technical scheme adopted by the invention for solving the technical problems is as follows: the hook type oxygen lance anti-falling device is arranged in an oxygen lance trolley and comprises a falling signal transmission mechanism, a hook and a buffering brake mechanism. The falling signal transmission mechanism comprises a lever mechanism, one end of the lever mechanism is connected with the oxygen lance trolley hanging mechanism, the other end of the lever mechanism is in contact with the hook, the buffering brake mechanism comprises an elastic component, a base and a connecting rod, one end of the elastic component is fixed at the top of the inner wall of the trolley, the other end of the elastic component is arranged on the base, the base is fixed on the connecting rod, and the buffering brake mechanism is connected with the hook through the connecting rod. When the oxygen lance lifting steel wire rope is broken, the oxygen lance trolley hanging mechanism moves downwards under the action of the spring to push the lever mechanism to drive the hook to push out and hang the arresting rod, and at the moment, the oxygen lance trolley continues to fall down, the elastic part is compressed, and the oxygen lance trolley stops falling in a buffering way; after the oxygen lance hoisting steel wire rope is repaired, the hook is separated from the blocking rod, the buffering and braking mechanism is completely reset after the braking process is finished, and normal production activities can be carried out.

The invention has the advantages of simple structure, no electricity and oil, meeting the equipment standard of an oxygen-enriched area and being capable of safely and reliably stopping the falling of the oxygen lance. And secondly, the brake device is free of an operation mechanism, belongs to hard braking, is free of abrasion and has zero use cost. In addition, the anti-falling mechanism can be naturally recovered after being used without subsequent cost. Finally, the structure is compact, the design is reasonable, the structure of the original oxygen lance lifting system is not changed, and the interference to the original movement mechanism is not possible.

Drawings

The invention is further illustrated with reference to the following figures and examples.

FIG. 1 is an elevation view of an oxygen lance and a lifting mechanism.

FIG. 2 is a side view of the lance and a lifting mechanism.

Fig. 3 is a sectional view B-B of fig. 2.

Fig. 4 is a sectional view a-a of fig. 1.

FIG. 5 is a cross-sectional view of the wire rope broken hook hanging the arresting bar A-A.

Fig. 6 is a cross-sectional view of the braking process a-a of the present invention.

Fig. 7 is a cross-sectional view of the braking process B-B of the present invention.

In the figure, 1, an oxygen lance, 2, an oxygen lance trolley, 3, an oxygen lance trolley track, 4, an oxygen lance trolley hanging mechanism, 5, a hanging hook, 6, a spring, 7, a falling signal transmission mechanism, 8, a lever mechanism, 9, a hook, 10, a buffering brake mechanism, 11, a connecting rod, 12, a base, 13, an elastic component, 14, a blocking rod, 15, an oxygen lance clamping seat and 16 a steel wire rope are arranged.

Detailed Description

In the figures 1 and 2, an oxygen lance 1 is arranged on an oxygen lance trolley 2 through an oxygen lance clamping seat 15 on the oxygen lance trolley 2, the oxygen lance trolley 2 moves up and down in an oxygen lance trolley track 3, and a blocking rod 14 is arranged between the oxygen lance trolley tracks 3.

In fig. 3 and 4, the oxygen lance carriage hanging mechanism 4 comprises a steel wire rope 16, a hanging hook 5 and a spring 6, when in normal production, the oxygen lance carriage 2 moves up and down in the oxygen lance carriage track 3 through the oxygen lance carriage hanging mechanism 4, and the spring 6 is under certain pressure. The hook type oxygen lance falling prevention device is arranged in an oxygen lance trolley 2, has no change to the structure of the original oxygen lance lifting system, and cannot interfere with the original movement mechanism, and comprises a falling signal transmission mechanism 7, a hook 9 and a buffering brake mechanism 10. The falling signal transmission mechanism 7 comprises a lever mechanism 8, one end of the lever mechanism 8 is connected with the oxygen lance trolley hanging mechanism 4, the other end of the lever mechanism 8 is contacted with a hook 9, and the hook 9 is arranged on a buffer brake mechanism 10 through a connecting rod 11. The buffering brake mechanism 10 comprises an elastic component 13, a base 12 and a connecting rod 11, wherein one end of the elastic component 13 is fixed on the top of the inner wall of the oxygen lance trolley 2, the other end of the elastic component is fixed on the base 12, and the base 12 is fixed on the connecting rod 11. The device is purely mechanical equipment without electricity and oil, accords with the equipment standard of an oxygen-enriched area, has no operation mechanism, has no abrasion in daily work, and has zero use cost.

In the embodiment shown in fig. 5, when the steel wire rope 16 is broken, the spring 6 is reset, the oxygen lance trolley hanging mechanism 4 moves downwards under the action of the spring 6, and the falling signal transmission mechanism 7 is driven to work, so that the hook 9 is pushed out to hang the barrier rod 14.

In the embodiment shown in fig. 6 and 7, when the hook 9 is hooked on the barrier rod 14, the hook 9, the connecting rod 11 connected with the hook and the base 12 stop falling, but the oxygen lance carriage 2 still continues to descend, so that the elastic part 13 is compressed, the oxygen lance carriage 2 stops descending in a buffering way, and the elastic part 13 can effectively reduce the impact force of the descending oxygen lance carriage 2, thereby reducing the possibility of damage to the oxygen lance carriage 2 and related equipment on the oxygen lance 1. After the steel wire rope 16 is repaired, the hook 9 is separated from the arresting rod 14, the buffering braking mechanism 10 is completely reset after the braking process is finished, normal production activities can be carried out, the buffer braking mechanism is easy to recover after braking, and subsequent cost is avoided.

Technical analysis

The maximum running speed of the oxygen lance is 40 m/min, namely 0.67 m/s, and the minimum running speed is 4 m/min, and the total weight of the oxygen lance, the oxygen lance trolley and the water pipe and the oxygen pipe is less than 3 tons, generally less than 2.8 tons. The maximum impact force is less than one tenth of the total weight, when the steel wire rope of the oxygen lance is broken, the buffer box body of the oxygen lance resets, the braking starts, the stroke can not exceed 300mm from the beginning of the braking to the end of the braking, and the braking force completely meets the requirement.

Claims

1. The utility model provides a falling prevention device for oxygen rifle, the oxygen rifle include the oxygen rifle dolly that is used for driving the oxygen rifle, oxygen rifle dolly track and oxygen rifle dolly hang the mechanism, characterized by: the oxygen lance lifting device comprises a falling signal transmission mechanism, a hook and a buffering brake mechanism, wherein the falling signal transmission mechanism is connected with an oxygen lance trolley hanging mechanism, the oxygen lance lifting mechanism is displaced when falling and is in contact with the hook, the hook faces to a blocking rod, the buffering brake mechanism is connected with the hook, and the falling prevention device is arranged in the oxygen lance trolley.

2. The lance fall prevention device as claimed in claim 1, which is characterized in that: the falling signal transmission mechanism comprises a lever mechanism, one end of the lever mechanism is connected with the oxygen lance trolley hanging mechanism, and the other end of the lever mechanism is in contact with the hook.

3. The lance fall prevention device as claimed in claim 1, which is characterized in that: the oxygen lance trolley hanging mechanism comprises a steel wire rope, and a spring is arranged on the oxygen lance trolley hanging mechanism.

4. The lance fall prevention device as claimed in claim 1, which is characterized in that: the buffering brake mechanism comprises at least one elastic part which is connected with the wall of the oxygen lance trolley and the hook.

5. The cushion brake mechanism of claim 4, wherein: the elastic component has at least two, and the elastic component links to each other with the couple.

6. The cushion brake mechanism of claim 5, wherein: the lower part of the hook is provided with a base, and the elastic part is fixed on the base.

7. The cushion brake mechanism of claim 5, wherein: the base is fixed on the connecting rod, and the hook is connected with the buffering brake mechanism through the connecting rod.

8. The cushion brake mechanism of claim 4, wherein: one end of the elastic component is connected with the top of the inner wall of the oxygen lance trolley.

9. The lance fall prevention device as claimed in claim 1, which is characterized in that: a blocking rod is arranged between the oxygen lance trolley rails.

10. The discourager bar of claim 9, wherein: the spacing between the bars is 300 mm.