Converter oxygen lance double-anti-falling trolley

Abstract

The utility model relates to a double-anti-falling trolley for a converter oxygen lance, which belongs to the technical field of converter steelmaking equipment and comprises an oxygen lance trolley and a transverse moving trolley, the oxygen lance trolley is positioned below the transverse moving trolley, a first anti-falling device and a second anti-falling device are respectively arranged on the oxygen lance trolley, and fixed rails are respectively arranged on two sides of the oxygen lance trolley. The first anti-falling device comprises a connecting shaft, the lower end of the connecting shaft is fixedly connected with the trolley frame, a pulley block support is hinged to the upper end of the connecting shaft, and a pulley block is arranged in the pulley block support. According to the anti-falling device, the limitation and the singleness that a traditional anti-falling device plays an anti-falling role only when a steel wire rope is broken or a connecting shaft is broken are broken; the same system is adopted to stop falling after the steel wire rope is broken or the connecting shaft is broken, and two sets of complementary interference anti-falling systems including speed limiting induction and mechanical linkage anti-falling machinery are adopted, so that the reliability and diversity of the anti-falling process are greatly improved.

Description

Technical Field

[0001] This utility model relates to a fall-prevention trolley, specifically a double fall-prevention trolley for converter oxygen lances, belonging to the technical field of converter steelmaking equipment. Background Technology

[0002] In steelmaking, the top-blown converter's double-winch oxygen blowing system uses a drum and wire rope to pull the oxygen lance lifting trolley to blow oxygen into the converter. However, during the smelting process, due to various reasons such as equipment aging and operational errors, lance falls often occur, which not only lead to unnecessary economic losses but may also endanger the lives of workers.

[0003] In the prior art, Chinese utility model patent application number CN201710455784.0 discloses an oxygen lance fall prevention device, which uses a guide rod, slide, return spring, and fall prevention block on the oxygen lance lifting trolley to prevent fall when the wire rope breaks. Another Chinese utility model patent application number CN202011569617.7 discloses a converter oxygen lance fall prevention trolley, which uses a compression spring seat, fall prevention block, and fall prevention brake rod to stop the fall after the wire rope or connecting shaft breaks. However, these devices mainly rely on the fall prevention mechanism after the wire rope breaks. In actual production, however, not all oxygen lance lifting trolley falls are caused by wire rope breakage; therefore, the fall prevention reliability of these devices has limitations. Summary of the Invention

[0004] This utility model patent addresses the shortcomings of the prior art by providing a converter oxygen lance double anti-fall trolley, aiming to achieve the following objectives:

[0005] 1. It can effectively stop a fall even after the wire rope or connecting shaft breaks; it improves the reliability of the fall-stopping process and avoids the impact of huge impact forces on the fall-stopping effect.

[0006] 2. Furthermore, it can accurately and reliably achieve the anti-fall function when the oxygen lance trolley's lifting speed exceeds the rated speed by 10%-30% without the wire rope or connecting shaft breaking, effectively ensuring the safety of equipment and the lives of workers during the steelmaking process.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A converter oxygen lance double anti-fall trolley includes an oxygen lance trolley and a transverse trolley. The oxygen lance trolley is located below the transverse trolley. The oxygen lance trolley is equipped with a first anti-fall device and a second anti-fall device. Fixed rails are provided on both sides of the oxygen lance trolley. Several anti-fall brake blocks are evenly arranged on the side of the fixed rails closest to the oxygen lance trolley. The first anti-fall device includes a connecting shaft. The lower end of the connecting shaft is fixedly connected to the trolley frame. A pulley block bracket is hinged to the upper end of the connecting shaft. A pulley block is provided inside the pulley block bracket.

[0009] As a further improvement to the above technical solution:

[0010] The first fall arrestor is located below the second fall arrestor, and the first and second fall arrestors share a common fall arrestor brake block.

[0011] The oxygen lance carriage includes a carriage frame, with guide wheels and pressure rollers on both sides of the carriage frame. The guide wheels are positioned above the pressure rollers, and the guide wheels and pressure rollers are set within a fixed track and slidably connected to the fixed track.

[0012] A compression spring seat is fitted around the outside of the connecting shaft, and a compression spring is installed inside the compression spring seat. The compression spring is fitted onto the connecting shaft.

[0013] A compression spring seat base plate is fixedly connected to the bottom of the compression spring seat. Two through holes are provided on both sides of the compression spring seat base plate. A vertically arranged guide shaft is provided in the through hole, and the guide shaft is fixedly connected to the trolley frame.

[0014] The compression spring seat is connected to two first fixing plates on both sides, and pressure columns are provided on the two first fixing plates respectively. The compression spring seat is provided to two second fixing plates on both sides below, and pins are provided on the two second fixing plates respectively. The pins are rotatably connected to a long anti-fall brake rod.

[0015] The upper end of the long anti-fall brake rod is provided with a guide groove along its length, and the pressure column is set in the guide groove and slidably connected to the guide groove.

[0016] The second fall arrest device includes fall arrest device frames respectively disposed on both sides of the compression spring seat. The two fall arrest device frames are symmetrically arranged, and short fall arrest brake rods are respectively hinged inside the two fall arrest device frames.

[0017] Pins are inserted into the upper outer sides of the two fall arrestor frames. The pins are inserted into the fall arrestor frames. One end of the short fall arrestor brake rod is located below the pin. The pin presses down one end of the short fall arrestor brake rod. The other end of the short fall arrestor brake rod is connected to one end of a traction spring. The other end of the traction spring is fixedly connected to the oxygen lance trolley.

[0018] The upper end of the pin is fixedly connected to the speed limiter wire rope. Speed ​​limiters are respectively provided on both sides above the traverse trolley. A counterweight track is provided below the speed limiter. The speed limiter wire rope is fixedly connected to the counterweight through the speed limiter and the counterweight track.

[0019] Working principle:

[0020] The working principle of the first anti-fall device: When the connecting shaft or wire rope breaks, the compression spring, which was originally in a compressed state, quickly extends, pushing the compression spring seat downwards rapidly. During the downward pressing of the compression spring seat, the pressure column on the spring seat causes the long anti-fall brake rod to rotate around the hinge point. The lower end of the long anti-fall brake rod expands outwards and engages with the anti-fall brake block, thereby realizing the anti-fall function of the oxygen lance trolley.

[0021] The working principle of the second fall arrestor is as follows: During the normal lifting and lowering of the oxygen lance trolley, the wire rope pulls the counterweight block to move smoothly up and down within the counterweight block guide rail. When the lifting and lowering speed of the oxygen lance trolley gradually increases, reaching 110%-130% of the preset rated speed value of the speed limiter, the rotational speed of the rope wheel inside the speed limiter also increases accordingly. At this time, the speed limiter activates, stopping the wire rope and pulling the pin out of the fall arrestor frame. After the pin is pulled out, the tensioned traction spring instantly releases its elastic potential energy and contracts, causing one end of the fall arrestor brake lever to rise and the other end to press down, causing the fall arrestor brake lever to open rapidly. Working in conjunction with the fall arrestor brake block, it stops the oxygen lance trolley, achieving the fall arrest function.

[0022] The present invention, by adopting the above technical solution, has the following advantages compared with the prior art:

[0023] This utility model features two different types of fall arrest devices, breaking the limitations and singularity of traditional fall arrest devices that only provide fall protection when the wire rope or connecting shaft breaks. By employing the same system to stop the fall after the wire rope or connecting shaft breaks, and by combining two complementary fall arrest systems—one speed limit sensor and one mechanical linkage—the reliability and versatility of the fall arrest process are greatly improved. This not only effectively ensures equipment safety and reduces economic losses during steelmaking production, but also truly protects the lives of workers.

[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of a converter oxygen lance double anti-fall trolley in an embodiment of this utility model;

[0026] Figure 2 yes Figure 1 Top view;

[0027] Figure 3This is a schematic diagram of the structure of the oxygen lance cart in an embodiment of this utility model;

[0028] Figure 4 This is a schematic diagram of the structure of the first and second fall protection devices in the embodiments of this utility model;

[0029] Figure 5 yes Figure 4 Rear view.

[0030] In the diagram, 1-lateral trolley, 2-oxygen lance trolley, 201-trolley frame, 202-guide wheel, 203-pressure roller, 3-fixed track, 4-anti-fall brake block, 5-first anti-fall device, 501-pulley block, 502-pulley block bracket, 503-connecting shaft, 504-compression spring seat, 505-compression spring, 506-compression spring seat base plate, 507-pressure column, 508-first fixed plate, 509-second fixed plate, 510-pin, 511-long anti-fall brake rod, 512-guide shaft, 513-guide groove, 6-second anti-fall device, 601-speed limiter, 602-speed limiter wire rope, 604-counterweight block, 605-pin, 606-anti-fall device frame, 607-pin, 608-short anti-fall brake rod, 609-traction spring, 7-counterweight block track. Detailed Implementation

[0031] Example: Figure 1-5 As shown, a converter oxygen lance double anti-fall trolley includes an oxygen lance trolley 2 and a transverse trolley 1. The oxygen lance trolley 2 is located below the transverse trolley 1. The oxygen lance trolley 2 is equipped with a first anti-fall device 5 and a second anti-fall device 6. Fixed tracks 3 are provided on both sides of the oxygen lance trolley 2. Several anti-fall brake blocks 4 are evenly provided on the side of the fixed track 3 closest to the oxygen lance trolley 2. The oxygen lance trolley 2 can achieve overall lifting and lowering along the fixed track 3.

[0032] The oxygen lance carriage 2 includes a carriage frame 201. Guide wheels 202 and pressure rollers 203 are respectively provided on both sides of the carriage frame 201. The guide wheels 202 are positioned above the pressure rollers 203. The guide wheels 202 and pressure rollers 203 are set in a fixed track 3 and are slidably connected to the fixed track 3. The carriage frame 201 can achieve vertical lifting and lowering within the fixed track 3 through the guide wheels 202 and pressure rollers 203.

[0033] The first fall arrestor 5 is located below the second fall arrestor 6; the first fall arrestor 5 and the second fall arrestor 6 share the fall arrestor brake block 4.

[0034] The first anti-fall device includes a connecting shaft 503. The lower end of the connecting shaft 503 is fixedly connected to the trolley frame 201. The upper end of the connecting shaft 503 is hinged to a pulley block bracket 502. A pulley block 501 is provided inside the pulley block bracket 502. A steel wire rope is connected to the pulley block 501. The steel wire rope is connected to the traction device.

[0035] A compression spring seat 504 is sleeved on the outside of the connecting shaft 503. A compression spring 505 is installed inside the compression spring seat 504. The compression spring 505 is sleeved on the connecting shaft 503 and is in a compressed state under the action of the compression spring seat 504. A compression spring seat base plate 506 is fixedly connected to the bottom of the compression spring seat 504. Two through holes are provided on both sides of the compression spring seat base plate 506. A vertically arranged guide shaft 512 is provided in the through holes. The guide shaft 512 is fixedly connected to the trolley frame 201. The guide shaft 512 is used to ensure that the compression spring seat 504 can move linearly downward in the longitudinal direction after the connecting shaft 503 or the wire rope breaks.

[0036] When the double anti-fall trolley is in normal use, the compression spring 505 is always in a compressed state. If the connecting shaft 503 or the wire rope breaks, the compression spring 505 will extend, causing the compression spring seat 504 to press down quickly.

[0037] The compression spring seat 504 is connected to two first fixing plates 508 on both sides. Each of the two first fixing plates 508 is provided with a pressure post 507. The compression spring seat 504 is provided to two second fixing plates 509 on both sides below. Each of the two second fixing plates 509 is provided with a pin 510. The pin 510 is rotatably connected to a long anti-fall brake rod 511. The upper end of the long anti-fall brake rod 511 is provided with a guide groove 513 along the length direction. The pressure post 507 is set in the guide groove 513 and is slidably connected to the guide groove 513.

[0038] The lower end of the long anti-fall brake rod 511 cooperates with the anti-fall brake block 4. When the wire rope on the pulley block 501 breaks or the connecting shaft 503 breaks, the compression spring 505 and the guide shaft 512 will press down the pulley block bracket 502 and the compression spring seat 504. Since the pressure column 507 on the compression spring seat 504 is inserted into the guide groove 513 of the long anti-fall brake rod 511, the long anti-fall brake rod 511 will be opened. The long anti-fall brake rod 511 and the anti-fall brake block 4 cooperate with each other to enable the trolley to achieve the first anti-fall effect.

[0039] The second fall arrestor includes fall arrestor frames 606 respectively disposed on both sides of the compression spring seat 504. The fall arrestor frames 606 are fixedly mounted on the oxygen lance trolley 2. The two fall arrestor frames 606 are symmetrically arranged. Short fall arrestor brake rods 608 are hinged inside each of the two fall arrestor frames 606. A pin 607 is provided between the short fall arrestor brake rods 608 and the fall arrestor frames 606, and the frames are hinged by the pin 607. Pins 605 are inserted into the upper outer sides of the two fall arrestor frames 606 respectively. The pins 605 are inserted into the fall arrestor frames 606, and one end of the short fall arrestor brake rod 608 is located at the pin. Below pin 605, pin 605 presses down one end of short anti-fall brake rod 608. The other end of short anti-fall brake rod 608 is connected to one end of traction spring 609. The other end of traction spring 609 is fixedly connected to oxygen lance trolley 2. When pin 605 presses down short anti-fall brake rod 608, traction spring 609 is stretched and stores elastic potential energy. When pin 605 is raised, traction spring 609 releases elastic potential energy and contracts, causing one end of short anti-fall brake rod 608 to rise and the other end to press down. Short anti-fall brake rod 608 changes to the open state and works in conjunction with anti-fall brake block 4 to achieve the anti-fall function.

[0040] The upper end of the pin 605 is fixedly connected to the speed limiter wire rope 602. Speed ​​limiters 601 are respectively provided on both sides above the transverse trolley 1. A counterweight track 7 is provided below the speed limiter 601. The speed limiter wire rope 602 is fixedly connected to the counterweight 604 through the speed limiter 601 and the counterweight track 7. When the oxygen lance trolley 2 moves up and down normally, the counterweight 604 is pulled up and down smoothly in the counterweight track 7 by the wire 2, which effectively avoids the collision problem caused by shaking and ensures the stability of the entire speed sensing system.

[0041] As the oxygen lance carriage 2 descends or ascends at an increasingly faster speed, the speed limiter wire rope 602 drives the internal pulley of the speed limiter 601 to rotate at a correspondingly higher speed. When the speed of the oxygen lance carriage 2 reaches 110%-130% of the preset rated speed value of the speed limiter 601, the speed limiter 601 brakes the speed limiter wire rope 602, thereby causing the pin 607 to be pulled out of the anti-fall device frame 606. After the pin 605 is pulled out, the traction spring 609 instantly changes from a stretched state storing elastic potential energy to a contracted state releasing elastic potential energy, instantly opening the short anti-fall brake lever 608, which, together with the anti-fall brake block 4, stops the oxygen lance carriage 2.

[0042] During normal operation, the speed limiter wire rope 602 is connected to the pin 605, and the speed limiter wire rope 602 is in a near-tight state. To prevent the pin 607 from being pulled out during normal operation, the anti-fall device frame 606 is provided with a baffle made of rubber or other materials. The friction between the baffle and the pin generates a certain resistance to prevent the pin 605 from being pulled out during normal operation.

[0043] This utility model features two different types of fall arrest devices, breaking the limitations and singularity of traditional fall arrest devices that only provide fall protection when the wire rope or connecting shaft breaks. By employing the same system to stop the fall after the wire rope or connecting shaft breaks, and by combining two complementary fall arrest systems—one speed limit sensor and one mechanical linkage—the reliability and versatility of the fall arrest process are greatly improved. This not only effectively ensures equipment safety and reduces economic losses during steelmaking production, but also truly protects the lives of workers.

[0044] Finally, it should be noted that the above descriptions are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. The examples of implementation methods, and the parts not described in detail, are all common knowledge to those skilled in the art. Those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A converter oxygen lance double-fall-prevention trolley, characterized in that: The application relates to a double-protection oxygen lance trolley device, which comprises an oxygen lance trolley (2) and a transverse trolley (1), wherein the oxygen lance trolley (2) is located below the transverse trolley (1), the oxygen lance trolley (2) is respectively provided with a first anti-falling device (5) and a second anti-falling device (6), the two sides of the oxygen lance trolley (2) are respectively provided with fixed tracks (3), the side of the fixed tracks (3) close to the oxygen lance trolley (2) is uniformly provided with a plurality of anti-falling brake blocks (4), the first anti-falling device comprises a connecting shaft (503), the lower end of the connecting shaft (503) is fixedly connected with a trolley frame (201), the upper end of the connecting shaft (503) is hingedly connected with a pulley block bracket (502), and the pulley block bracket (502) is internally provided with a pulley block (501).

2. The converter oxygen lance double-falling-prevention trolley according to claim 1, characterized in that: The first anti-falling device (5) is located below the second anti-falling device (6), and the first anti-falling device (5) and the second anti-falling device (6) share the anti-falling brake blocks (4).

3. The converter oxygen lance double-falling-prevention trolley according to claim 2, characterized in that: The oxygen lance trolley (2) comprises a trolley frame (201), the two sides of the trolley frame (201) are respectively provided with guide wheels (202) and compression roller wheels (203), the guide wheels (202) are arranged above the compression roller wheels (203), and the guide wheels (202) and the compression roller wheels (203) are arranged in the fixed tracks (3) and are in sliding connection with the fixed tracks (3).

4. The converter oxygen lance double-falling-prevention trolley according to claim 3, characterized in that: The connecting shaft (503) is externally provided with a compression spring seat (504), the compression spring seat (504) is internally provided with a compression spring (505), and the compression spring (505) is sleeved on the connecting shaft (503).

5. The converter oxygen lance double-falling-prevention trolley according to claim 4, characterized in that: The lower side of the compression spring seat (504) is fixedly connected with a compression spring seat bottom plate (506), the two sides of the compression spring seat bottom plate (506) are respectively provided with two through holes, the through holes are provided with vertically-arranged guide shafts (512), and the guide shafts (512) are fixedly connected with the trolley frame (201).

6. The converter oxygen lance double-falling-prevention trolley according to claim 5, characterized in that: The two sides of the compression spring seat (504) are respectively connected with first fixing plates (508), the two first fixing plates (508) are respectively provided with pressing columns (507), the lower sides of the two sides of the compression spring seat (504) are respectively provided with second fixing plates (509), the two second fixing plates (509) are respectively provided with pin shafts (510), and the pin shafts (510) are rotatably connected with long anti-falling brake rods (511).

7. The converter oxygen lance double-falling-prevention trolley according to claim 6, characterized in that: The upper end of the long anti-falling brake rod (511) is provided with a guide groove (513) along the length direction, the pressing column (507) is arranged in the guide groove (513) and is in sliding connection with the guide groove (513).

8. The converter oxygen lance double-fall-prevention trolley according to claim 1, characterized in that: The second anti-falling device comprises anti-falling device frames (606) arranged on the two sides of the compression spring seat (504), the two anti-falling device frames (606) are symmetrically arranged, and the two anti-falling device frames (606) are respectively hingedly connected with short anti-falling brake rods (608).

9. The converter oxygen lance double-fall-prevention trolley according to claim 8, characterized in that: The upper outer side of the two fall protection device frames (606) is respectively inserted with a latch (605), the latch (605) is inserted into the fall protection device frame (606), one end of a short fall protection brake lever (608) is located below the latch (605), the latch (605) presses down one end of the short fall protection brake lever (608), the other end of the short fall protection brake lever (608) is connected with one end of a traction spring (609), the other end of the traction spring (609) is fixedly connected with the oxygen lance trolley (2).

10. The converter oxygen lance double-fall-prevention trolley according to claim 9, characterized in that: The upper end of the latch (605) is fixedly connected with a speed limiter steel wire rope (602), the upper two sides of the traversing trolley (1) are respectively provided with a speed limiter (601), a counterweight track (7) is arranged below the speed limiter (601), and the speed limiter steel wire rope (602) is fixedly connected with a counterweight (604) in sequence through the speed limiter (601) and the counterweight track (7).

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