CN218710624U

CN218710624U - Overspeed centrifugal type oxygen lance anti-falling device

Info

Publication number: CN218710624U
Application number: CN202222879925.0U
Authority: CN
Inventors: 田凤芝; 郭绍坡; 潘炳辰; 史超
Original assignee: Tangshan Huahang Chuangxian Electromechanical Equipment Co ltd
Current assignee: Tangshan Huahang Chuangxian Electromechanical Equipment Co ltd
Priority date: 2022-10-31
Filing date: 2022-10-31
Publication date: 2023-03-24
Anticipated expiration: 2032-10-31

Abstract

The utility model relates to an overspeed centrifugal oxygen lance anti-falling device, which belongs to the technical field of oxygen lance anti-falling devices in the steel-making process of the metallurgical industry. The technical scheme is as follows: the rack (4) is fixed between the two fixed rails (2), the transmission shaft (7) and the conical sleeve (8) are respectively arranged in the shell (6), the shell (6) is fixed on the oxygen lance trolley (1) through the hinged seat (19), the transmission shaft (7) is provided with a gear (9) meshed with the rack (4) and a support (14) integrated with the transmission shaft (7), one end of the centrifugal block (11) is rotatably connected to the support (14), and a pull rod (13) and a spring (12) are arranged between the other end of the centrifugal block (11) and the support (14); tooth grooves (15) which are matched with the centrifugal blocks and are arranged at intervals are arranged in the conical sleeve (8). The beneficial effects of the utility model are that: the braking is sensitive, and the braking effect on overspeed falling caused by any reason can be good.

Description

Overspeed centrifugal type oxygen lance falling-proof device

Technical Field

The utility model relates to an overspeed centrifugal oxygen lance anti-falling device, which belongs to the technical field of oxygen lance anti-falling devices in the steel-making process of the metallurgical industry.

Background

The oxygen lance system is one of the main devices in the steel-making process, and is a key device for blowing oxygen into a high-temperature hearth in the smelting process to convert iron into steel. The oxygen lance carriage is positioned above the converter mouth in the converter steelmaking process, once the steel wire rope is broken, the oxygen lance falls into the converter along with the oxygen lance carriage, the oxygen lance is cooled by high-pressure circulating water, and the explosion accident happens when the oxygen lance falls into a hearth, so that the reliable operation of the oxygen lance anti-falling device is a major risk source in the production process, and the reliable operation of the oxygen lance anti-falling device is a basic guarantee for eliminating the major risk. And the oxygen lance falls from a high position to generate huge impact force, and if the oxygen lance falls from a higher position, the oxygen lance can damage and influence the fixed rail and peripheral equipment to different degrees.

At present, the widely used oxygen lance anti-falling devices mainly comprise three types, namely a toothed eccentric brake rod extrusion braking anti-falling device, a wedge brake shoe extrusion braking anti-falling device and a scissor type brake rod insertion card braking anti-falling device, wherein the working principle of the anti-falling device is that a spring below a vehicle body pulley is reset through the breakage of a steel wire rope, and a similar mechanism for preventing falling is driven by an elastic driving connecting rod to drive a wedge block to extrude a fixed rail. The device has the problems of braking failure and long production recovery time after braking, the device is triggered on the premise that the steel wire rope is broken, the device can not react except for the accident reason, and can not cope with sudden sliding of other reasons, and once the oxygen lance falling accident occurs, the original oxygen lance falling prevention device is almost damaged and extremely difficult to repair.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an overspeed centrifugal oxygen lance anti-falling device, the braking is sensitive, can all play fine braking effect to the overspeed that any reason leads to falling, solves the problem that exists among the background art.

The technical scheme of the utility model is that:

an overspeed centrifugal type oxygen lance anti-falling device comprises an oxygen lance trolley, fixed rails, racks, a shell, a transmission shaft, a conical sleeve, a gear, a centrifugal block, a spring, a pull rod, a support, a tooth groove, a screw, a nut, a guide pillar, a hinged seat and a disc spring, wherein the oxygen lance trolley runs on the two fixed rails, and the racks are fixed between the two fixed rails; the transmission shaft and the conical sleeve are respectively arranged in the shell, the shell is fixed on the oxygen lance trolley through the hinged seat, the transmission shaft is provided with a gear meshed with the rack and a support integrated with the transmission shaft, one end of the centrifugal block is rotatably connected on the support, and a pull rod and a spring are arranged between the other end of the centrifugal block and the support; be equipped with in the toper sleeve with the centrifugal piece cooperate and the tooth's socket of interval arrangement, the less one end of toper sleeve diameter is fixed with the screw rod, screw rod threaded connection is on the nut, and the nut both sides are sliding connection respectively on the guide pillar, and the guide pillar is fixed on the casing, is equipped with the dish spring between nut and the casing.

The rack is provided with a back wheel which is connected with the rack in a rolling way, and the back wheel is fixed on the shell through a rotating shaft.

One end of the centrifugal block, which is matched with the tooth grooves arranged at intervals in the conical sleeve, is pointed.

The rack is fixed on the upright post, and the upright post is fixed between the two fixed rails.

The shell is fixed on the oxygen lance trolley through an upper hinged seat and a lower hinged seat.

The utility model has the advantages that: the device has the advantages of simple and compact structure, convenience in installation and maintenance, high running stability, safe and reliable performance and sensitive braking response, can play a good braking effect on overspeed falling caused by any reason, does not depend on other electrical signal sources, is purely mechanical equipment without electricity and oil, and accords with the equipment standard of an oxygen-enriched area.

Drawings

FIG. 1 is a front view of the whole oxygen lance carriage;

FIG. 2 isbase:Sub>A cross-sectional view A-A of FIG. 1;

FIG. 3 is a cross-sectional view B-B of FIG. 2 in a normal operating condition;

FIG. 4 is a cross-sectional view B-B of FIG. 2 in an accident situation;

in the figure: the oxygen lance bogie comprises an oxygen lance bogie 1, a fixed track 2, an anti-falling safety device 3, a rack 4, a stand column 5, a shell 6, a transmission shaft 7, a conical sleeve 8, a gear 9, a back wheel 10, a centrifugal block 11, a spring group 12, a pull rod 13, a support 14, a tooth groove 15, a screw 16, a nut 17, a guide column 18, a hinged seat 19 and a disc spring 20.

Detailed Description

The invention will be further explained by way of example with reference to the accompanying drawings.

Referring to the attached drawings 1-4, the overspeed centrifugal type oxygen lance anti-falling device comprises an oxygen lance trolley 1, fixed rails 2, a rack 4, a shell 6, a transmission shaft 7, a conical sleeve 8, a gear 9, a centrifugal block 11, a spring 12, a pull rod 13, a support 14, a tooth groove 15, a screw 16, a nut 17, a guide pillar 18, a hinged seat 19 and a disc spring 20, wherein the oxygen lance trolley 1 runs on the two fixed rails 2, and the rack 4 is fixed between the two fixed rails 2; a transmission shaft 7 and a conical sleeve 8 are respectively arranged in a shell 6, the shell 6 is fixed on an oxygen lance trolley 1 through a hinged seat 19, the transmission shaft 7 is provided with a gear 9 meshed with a rack 4 and a support 14 integrated with the transmission shaft 7, one end of a centrifugal block 11 is rotatably connected on the support 14, and a pull rod 13 and a spring 12 are arranged between the other end of the centrifugal block 11 and the support 14; a tooth groove 15 which is matched with the centrifugal block 11 and is arranged at intervals is arranged in the conical sleeve 8, a screw 16 is fixed at one end of the conical sleeve 8 with a smaller diameter, the screw 16 is in threaded connection with a nut 17, two sides of the nut 17 are respectively in sliding connection with guide posts 18, the guide posts 18 are fixed on the shell 6, and a disc spring 20 is arranged between the nut 17 and the shell 6.

In this example, referring to fig. 1, the housing 6, the transmission shaft 7, the tapered sleeve 8, the gear 9, the back wheel 10, the centrifugal block 11, the spring set 12, the pull rod 13, the support 14, the tooth space 15, the screw 16, the nut 17, the guide post 18, the hinge seat 19 and the disc spring 20 together form the fall arrest safety device 3. The oxygen lance trolley 1 moves up and down in the fixed track 2, the anti-falling safety device 3 is arranged at the upper part of the oxygen lance trolley 1, the rack 4 is fixed at the middle position of the fixed track 2, and the rack 4 is meshed with the gear 9 in the anti-falling safety device 3.

Referring to the attached drawings 2-4, a rack 4 is fixed on a section steel upright post 5, the section steel upright post 5 is installed between plant platforms and fixed with a fixed rail 2, and a falling prevention safety device 3 is installed on an oxygen lance trolley 1 through an upper hinged seat and a lower hinged seat 19 on a shell 6 of the falling prevention safety device, wherein the lower hinged seat has a certain swinging freedom degree.

The back wheel 10 is fixed on the shell 6 through a rotating shaft, the back wheel 1 is connected on the rack 4 in a rolling mode, the back wheel 10 ensures that the whole anti-falling safety device 3 is in uniform contact along the direction of the rack 4 and always keeps the gear 9 meshed with the rack 4, and therefore the influences of field installation errors of the rack and deformation of the device in the using process on gear meshing are effectively eliminated.

When the oxygen lance trolley 1 normally runs, the anti-falling safety device 3 is meshed with a rack 4 arranged on the oxygen lance fixed track 2, and the transmission shaft 7 rotates along with the rack.

When the oxygen lance trolley 1 runs downwards at a rated speed, the centrifugal block 11 is tightly attached to the transmission shaft 7 under the action of the pulling force of the spring 12 and the pull rod 13, and the tip of the centrifugal block 11 is separated from the tooth groove 15 in the conical sleeve 8, as shown in fig. 3.

When the downward running speed of the oxygen lance trolley 1 exceeds the rated speed, the centrifugal block 11 overcomes the pulling force of the spring 12 and the pull rod 13 to be thrown outwards due to the centrifugal force, the tip of the centrifugal block 11 is contacted with the bottom of the tooth groove 15 in the conical sleeve 8, as shown in the attached drawing 4, the conical sleeve 8 is rapidly driven to rotate, the screw rod 16 fixed on the conical sleeve 8 axially moves along with the tip, the nut 17 is driven to move inwards along the guide post 18, and the disc spring 20 is gradually compressed. Under the reaction force of the disc spring 20, the pressing force of the non-metal friction plate inside the shell 6 and the outer conical surface of the conical sleeve 8 is gradually increased, the braking torque is gradually increased, then the conical sleeve 8 reversely drives the transmission shaft 7 to stop rotating, and the oxygen lance trolley 1 stops falling due to the meshing relationship of the gear 9 and the rack 4 on the transmission shaft 7, so that the purpose of stable braking is achieved.

After the oxygen lance trolley 1 is braked, the accident cause of falling is processed, the oxygen lance trolley 1 is driven by a winch to be lifted upwards, the gear transmission shaft 7 rotates reversely at the moment, the centrifugal block 11 is separated from the root part of the tooth socket of the conical iron core 8, the centrifugal block 11 is attached to the transmission shaft 7 again under the action of the pulling force of the spring 12 and the pull rod 13, the conical sleeve 8 is in a free moving state, then the shell 6 is separated from the conical sleeve 8 in a braking manner under the action of the disc spring 20, and the whole safety device returns to the initial state.

The utility model discloses compact structure, the size is little, saves space, and easy installation, the independence is strong, and its braking process is not associated with other equipment emergence, if wire rope breaks off or the hoist engine breaks down, can effectively lock the oxygen rifle dolly on the track, prevents that the oxygen rifle dolly from continuing the tenesmus along the lift track, and then prevents that the oxygen rifle on the oxygen rifle lift dolly from tenesmus to the converter in, has improved the safety in utilization of oxygen rifle system greatly.

Claims

1. An overspeed centrifugal oxygen lance anti-falling device is characterized in that: the oxygen lance bogie comprises an oxygen lance trolley (1), fixed rails (2), a rack (4), a shell (6), a transmission shaft (7), a conical sleeve (8), a gear (9), a centrifugal block (11), a spring (12), a pull rod (13), a support (14), a tooth space (15), a screw (16), a nut (17), a guide pillar (18), a hinged seat (19) and a disc spring (20), wherein the oxygen lance trolley (1) runs on the two fixed rails (2), and the rack (4) is fixed between the two fixed rails (2); a transmission shaft (7) and a conical sleeve (8) are respectively arranged in a shell (6), the shell (6) is fixed on an oxygen lance trolley (1) through a hinged seat (19), a gear (9) meshed with a rack (4) and a support (14) integrated with the transmission shaft (7) are arranged on the transmission shaft (7), one end of a centrifugal block (11) is rotatably connected on the support (14), and a pull rod (13) and a spring (12) are arranged between the other end of the centrifugal block (11) and the support (14); tooth grooves (15) which are matched with the centrifugal blocks (11) and are arranged at intervals are formed in the conical sleeve (8), a screw rod (16) is fixed at one end of the conical sleeve (8) with the smaller diameter, the screw rod (16) is in threaded connection with a nut (17), two sides of the nut (17) are connected to guide posts (18) in a sliding mode respectively, the guide posts (18) are fixed on the shell (6), and a disc spring (20) is arranged between the nut (17) and the shell (6).

2. The anti-falling device for the overspeed centrifugal oxygen lance as recited in claim 1, wherein: the rack (4) is provided with a back wheel (10) which is connected with the rack (4) in a rolling way, and the back wheel (10) is fixed on the shell (6) through a rotating shaft.

3. The overspeed centrifugal oxygen lance fall-preventing device of claim 1 or 2, which is characterized in that: one end of the centrifugal block (11) matched with the tooth grooves (15) arranged at intervals in the conical sleeve (8) is pointed.

4. The anti-falling device for the overspeed centrifugal oxygen lance as recited in claim 1 or 2, wherein: the rack (4) is fixed on the upright post (5), and the upright post (5) is fixed between the two fixed rails (2).

5. The overspeed centrifugal oxygen lance fall-preventing device of claim 1 or 2, which is characterized in that: the shell (6) is fixed on the oxygen lance trolley (1) through an upper hinged seat and a lower hinged seat (19).