Converter oxygen lance double-anti-falling trolley

Abstract

The invention relates to a converter oxygen lance double-anti-falling trolley and belongs to the technical field of converter steelmaking equipment, the converter oxygen lance double-anti-falling trolley comprises an oxygen lance trolley and a transverse moving trolley, the oxygen lance trolley is located below the transverse moving trolley, a first anti-falling device and a second anti-falling device are arranged on the oxygen lance trolley respectively, and fixed rails are arranged on the two sides of the oxygen lance trolley respectively. A plurality of anti-falling brake blocks are evenly arranged on the side, close to the oxygen lance trolley, of the fixed rail, the first anti-falling device is located below the second anti-falling device, and the first anti-falling device and the second anti-falling device share the anti-falling brake blocks. The limitation and the singleness that a traditional anti-falling device only plays an anti-falling role 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] The invention relates to an anti-falling trolley, in particular to a double anti-falling trolley for a converter oxygen lance, and belongs to the technical field of converter steelmaking equipment. Background Art

[0002] In steel production, the double winch oxygen blowing device of the top-blown converter uses a drum and a wire rope to drag 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 operating errors, lance drop accidents often occur, which not only causes unnecessary economic losses, but also may endanger the lives of workers.

[0003] In the prior art, the Chinese invention patent with patent application number CN201710455784.0 discloses an oxygen lance anti-fall device, which prevents falling when the wire rope breaks by setting guide rods, slides, return springs, and anti-fall blocks on the oxygen lance lifting trolley. There is also a Chinese invention patent with patent application number CN202011569617.7, which discloses a converter oxygen lance anti-fall trolley, which uses a compression spring seat, an anti-fall pressure block, an anti-fall brake rod and other components to prevent falling after the wire rope or connecting shaft breaks. However, these devices mainly rely on the anti-fall mechanism after the wire rope breaks. However, in the actual production process, the falling accidents of the oxygen lance lifting trolley are not all caused by the breakage of the wire rope, so the anti-fall reliability of these devices is limited. Summary of the invention

[0004] Aiming at the deficiencies in the background technology, the present invention provides a converter oxygen lance double anti-fall trolley, aiming to achieve the following purposes: 1. It can effectively stop the fall even after the wire rope breaks or the connecting shaft breaks; improve the reliability of the fall-stopping process and avoid the huge impact force affecting the fall-stopping effect.

[0005] 2. When the wire rope or connecting shaft is not broken, and the lifting speed of the oxygen lance trolley exceeds the rated speed by 10%-30%, it can accurately and reliably realize the anti-fall function, effectively ensuring the equipment safety and the life safety of the workers in the steelmaking production process.

[0006] To achieve the above object, the present invention adopts the following technical solutions: A double anti-fall trolley for a converter oxygen lance comprises an oxygen lance trolley and a transverse movement trolley. The oxygen lance trolley is located below the transverse movement trolley. A first anti-fall device and a second anti-fall device are respectively provided on the oxygen lance trolley. Fixed rails are respectively provided on both sides of the oxygen lance trolley. A plurality of anti-fall brake blocks are evenly provided on one side of the fixed rail close to the oxygen lance trolley. The first anti-fall device is located below the second anti-fall device. The first anti-fall device and the second anti-fall device share the anti-fall brake block.

[0007] As a further improvement of the above technical solution: The oxygen gun trolley comprises a trolley frame, and guide wheels and pressure roller wheels are respectively arranged on both sides of the trolley frame. The guide wheels are arranged above the pressure roller wheels, and the guide wheels and the pressure roller wheels are arranged in a fixed track and are slidably connected to the fixed track.

[0008] The first anti-falling device comprises a connecting shaft, the lower end of which is fixedly connected to the trolley frame, the upper end of which is hingedly connected to a pulley block bracket, and a pulley block is arranged in the pulley block bracket.

[0009] The outer sleeve of the connecting shaft is provided with a compression spring seat, a compression spring is installed in the compression spring seat, and the compression spring sleeve is arranged on the connecting shaft.

[0010] A compression spring seat bottom plate is fixedly connected below the compression spring seat, two through holes are respectively arranged on both sides of the compression spring seat bottom plate, a vertically arranged guide shaft is arranged in the through hole, and the guide shaft is fixedly connected to the trolley frame.

[0011] The two sides of the compression spring seat are respectively connected with first fixing plates, and the two first fixing plates are respectively provided with pressure columns. The two sides below the compression spring seat are respectively provided with second fixing plates, and the two second fixing plates are respectively provided with pins, which are rotatably connected with a long anti-fall brake rod.

[0012] The upper end of the long anti-fall brake rod is provided with a guide groove along the length direction, and the pressure column is arranged in the guide groove and is slidably connected with the guide groove.

[0013] The second anti-falling device comprises anti-falling device frames respectively arranged on both sides of the compression spring seat, the two anti-falling device frames are symmetrically arranged, and short anti-falling brake rods are respectively hinged inside the two anti-falling device frames.

[0014] The upper outer sides of the two anti-fall device frames are respectively connected with pins, the pins are inserted into the anti-fall device frames, one end of the short anti-fall brake rod is located below the pins, the pin presses down one end of the short anti-fall brake rod, the other end of the short anti-fall brake rod is connected with one end of a traction spring, and the other end of the traction spring is fixedly connected to the oxygen gun trolley.

[0015] The upper end of the latch is fixedly connected to a speed limiter wire rope, speed limiters are respectively arranged on both sides above the transverse trolley, a counterweight track is arranged below the speed limiter, and the speed limiter wire rope is fixedly connected to the counterweight via the speed limiter and the counterweight track in sequence.

[0016] Working principle: Working principle of the first anti-fall device: When the connecting shaft or wire rope breaks, the compression spring that was originally in a compressed state quickly stretches and pushes the compression spring seat down quickly. During the downward compression 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, and the lower end of the long anti-fall brake rod is stretched outward and clamped onto the anti-fall brake block, thereby realizing the anti-fall function of the oxygen gun trolley.

[0017] Working principle of the second anti-fall device: During the normal lifting process of the oxygen gun trolley, the steel wire rope pulls the counterweight block to move up and down smoothly in the counterweight block guide rail. When the lifting speed of the oxygen gun trolley gradually increases and reaches 110%-130% of the preset rated speed value of the speed limiter, the speed of the rope wheel inside the speed limiter also increases accordingly. At this time, the speed limiter acts to stop the movement of the steel wire rope, and then pulls the pin out of the anti-fall device frame. After the pin is pulled out, the traction spring in the stretched state instantly releases elastic potential energy and contracts, driving one end of the anti-fall brake rod to lift and the other end to press down, so that the anti-fall brake rod quickly opens, and cooperates with the anti-fall brake block to stop the oxygen gun trolley and realize the anti-fall function.

[0018] After adopting the above technical solution, the present invention has the following advantages compared with the prior art: The present invention has two different forms of anti-fall devices, which break the limitation and singleness of traditional anti-fall devices that can only play an anti-fall role when the wire rope breaks or the connecting shaft breaks; relying on the use of the same system to stop falling after the wire rope breaks or the connecting shaft breaks, and the two sets of complementary interference anti-fall systems of speed limit sensing and mechanical linkage anti-fall machinery, the reliability and diversity of the anti-fall process are greatly improved, which can not only effectively ensure the safety of equipment in the steelmaking production process and reduce economic losses, but also effectively protect the lives of workers.

[0019] The present invention will be further described below in conjunction with the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of a double anti-falling trolley for a converter oxygen lance in an embodiment of the present invention; Figure 2 yes Figure 1 A top view of Figure 3 It is a structural schematic diagram of an oxygen lance trolley in an embodiment of the present invention; Figure 4 is a schematic structural diagram of a first anti-falling device and a second anti-falling device in an embodiment of the present invention; Figure 5 yes Figure 4 Rear view of.

[0021] In the figure, 1-transverse trolley, 2-oxygen gun trolley, 201-trolley frame, 202-guide wheel, 203-pressure roller wheel, 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 bottom plate, 507-pressure column, 508-first fixed plate, 509-second fixed plate, 510-pin shaft, 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 shaft, 608-short anti-fall brake rod, 609-traction spring, 7-counterweight block track. DETAILED DESCRIPTION

[0022] Example: Figure 1-5 As shown, a double anti-fall trolley for a converter oxygen lance comprises an oxygen lance trolley 2 and a transverse trolley 1. The oxygen lance trolley 2 is located below the transverse trolley 1. A first anti-fall device 5 and a second anti-fall device 6 are respectively provided on the oxygen lance trolley 2. Fixed rails 3 are respectively provided on both sides of the oxygen lance trolley 2. A plurality of anti-fall brake blocks 4 are evenly provided on one side of the fixed rail 3 close to the oxygen lance trolley 2. The oxygen lance trolley 2 is lifted and lowered as a whole along the fixed rail 3.

[0023] The oxygen gun trolley 2 includes a trolley frame 201, and guide wheels 202 and pressure roller wheels 203 are respectively provided on both sides of the trolley frame 201. The guide wheel 202 is arranged above the pressure roller wheel 203. The guide wheel 202 and the pressure roller wheel 203 are arranged in a fixed track 3 and are slidably connected to the fixed track 3. The trolley frame 201 is vertically lifted and lowered in the fixed track 3 through the guide wheel 202 and the pressure roller wheel 203.

[0024] The first anti-falling device 5 is located below the second anti-falling device 6 ; the first anti-falling device 5 and the second anti-falling device 6 share the anti-falling brake block 4 .

[0025] The first anti-falling 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 with a pulley block bracket 502, the pulley block bracket 502 is provided with a pulley block 501, the pulley block 501 is connected to a steel wire rope, and the steel wire rope is connected to the traction device.

[0026] A compression spring seat 504 is sleeved on the outside of the connecting shaft 503, and a compression spring 505 is installed in the compression spring seat 504. The compression spring 505 is sleeved on the connecting shaft 503, and the compression spring 505 is in a compressed state under the action of the compression spring seat 504; a compression spring seat bottom plate 506 is fixedly connected to the bottom of the compression spring seat 504, and two through holes are respectively provided on both sides of the compression spring seat bottom plate 506, and a vertically arranged guide shaft 512 is provided in the through hole. The guide shaft 512 is fixedly connected to the trolley frame 201, and the guide shaft 512 is used to ensure that after the connecting shaft 503 or the wire rope breaks, the compression spring seat 504 can perform a linear downward movement in the longitudinal direction.

[0027] When the double anti-fall trolley is in normal use, the compression spring 505 is always in a compressed state. Once the connecting shaft 503 or the wire rope breaks, the compression spring 505 will stretch, causing the compression spring seat 504 to be quickly pressed down.

[0028] The two sides of the compression spring seat 504 are respectively connected to the first fixing plates 508, and the two first fixing plates 508 are respectively provided with compression columns 507. The two sides below the compression spring seat 504 are respectively provided with second fixing plates 509, and the two second fixing plates 509 are respectively provided with pins 510. The pins 510 are rotatably connected to the 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 compression column 507 is arranged in the guide groove 513 and is slidably connected to the guide groove 513.

[0029] The lower end of the long anti-falling brake rod 511 cooperates with the anti-falling 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-falling brake rod 511, the long anti-falling brake rod 511 will be opened. The long anti-falling brake rod 511 and the anti-falling brake block 4 cooperate with each other to enable the trolley to achieve the first anti-falling effect.

[0030] The second anti-falling device includes an anti-falling device frame 606 respectively arranged on both sides of the compression spring seat 504, the anti-falling device frame 606 is fixedly arranged on the oxygen gun trolley 2, the two anti-falling device frames 606 are symmetrically arranged, and short anti-falling brake rods 608 are respectively hinged inside the two anti-falling device frames 606, and a pin shaft 607 is provided between the short anti-falling brake rod 608 and the anti-falling device frame 606, which are hinged by the pin shaft 607, and the upper outer sides of the two anti-falling device frames 606 are respectively plugged with a latch 605, the latch 605 is inserted into the anti-falling device frame 606, and one end of the short anti-falling brake rod 608 is located at the latch Below 605, the pin 605 presses down one end of the short anti-fall brake rod 608, and the other end of the short anti-fall brake rod 608 is connected to one end of a traction spring 609, and the other end of the traction spring 609 is fixedly connected to the oxygen gun trolley 2. When the pin 605 presses down the short anti-fall brake rod 608, the traction spring 609 is stretched and stores elastic potential energy. When the pin 605 is lifted, the traction spring 609 releases the elastic potential energy and contracts, driving one end of the short anti-fall brake rod 608 to lift and the other end to press down, and the short anti-fall brake rod 608 is transformed into an open state, cooperating with the anti-fall brake block 4 to realize the anti-fall function.

[0031] The upper end of the latch 605 is fixedly connected to a 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, and the speed limiter wire rope 602 is fixedly connected to a counterweight 604 via the speed limiter 601 and the counterweight track 7 in sequence. When the oxygen gun trolley 2 moves up and down normally, the counterweight 604 is pulled up and down smoothly in the counterweight track 7 by the steel wire 2, effectively avoiding collision problems caused by shaking, and ensuring the stability of the entire speed sensing system.

[0032] When the oxygen lance trolley 2 falls or rises at an increasing speed, the speed limiter wire rope 602 drives the rotation speed of the internal rope wheel of the speed limiter 601 to increase accordingly. When the speed of the oxygen lance trolley 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, so that the latch 607 is pulled out of the anti-fall device frame 606. When the latch 605 is pulled out, the traction spring 609 changes from a stretched state storing elastic potential energy to a contracted and released elastic potential energy state in an instant, and the short anti-fall brake rod 608 is opened in an instant, and the oxygen lance trolley 2 is braked in cooperation with the anti-fall brake block 4.

[0033] 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 nearly taut state. In order to prevent the pin 607 from being pulled out during normal movement, a baffle made of rubber or other materials is provided on the anti-fall device frame 606. The friction between the baffle and the pin generates a certain resistance to prevent the pin 605 from being pulled out during normal movement.

[0034] The present invention has two different forms of anti-fall devices, which break the limitation and singleness of traditional anti-fall devices that can only play an anti-fall role when the wire rope breaks or the connecting shaft breaks; relying on the use of the same system to stop falling after the wire rope breaks or the connecting shaft breaks, and the two sets of complementary interference anti-fall systems of speed limit sensing and mechanical linkage anti-fall machinery, the reliability and diversity of the anti-fall process are greatly improved, which can not only effectively ensure the safety of equipment in the steelmaking production process and reduce economic losses, but also effectively protect the lives of workers.

[0035] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. The examples of the implementation methods and the parts not described in detail are common knowledge of ordinary technicians in the field. For those skilled in the art, they can still modify the technical solutions recorded in the above embodiments, or replace some of the technical features therein with equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A double anti-fall trolley for a converter oxygen lance, characterized in that: The invention comprises an oxygen lance trolley (2) and a transverse trolley (1), wherein the oxygen lance trolley (2) is located below the transverse trolley (1), a first anti-falling device (5) and a second anti-falling device (6) are respectively provided on the oxygen lance trolley (2), fixed rails (3) are respectively provided on both sides of the oxygen lance trolley (2), a plurality of anti-falling brake blocks (4) are evenly provided on one side of the fixed rails (3) close to the oxygen lance trolley (2), 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 block (4).

2. A converter oxygen lance double anti-falling trolley according to claim 1, characterized in that: The oxygen lance trolley (2) comprises a trolley frame (201), guide wheels (202) and pressure roller wheels (203) are respectively provided on both sides of the trolley frame (201), the guide wheels (202) are arranged above the pressure roller wheels (203), and the guide wheels (202) and the pressure roller wheels (203) are arranged in a fixed track (3) and are slidably connected to the fixed track (3).

3. A converter oxygen lance double anti-falling trolley according to claim 2, characterized in that: The first anti-falling device comprises 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 hingedly connected to a pulley block bracket (502), and the pulley block bracket (502) is provided with a pulley block (501).

4. A converter oxygen lance double anti-falling trolley according to claim 3, characterized in that: The outer portion of the connecting shaft (503) is sleeved with a compression spring seat (504), a compression spring (505) is installed in the compression spring seat (504), and the compression spring (505) is sleeved on the connecting shaft (503).

5. A converter oxygen lance double anti-falling trolley according to claim 4, characterized in that: A compression spring seat bottom plate (506) is fixedly connected below the compression spring seat (504), two through holes are respectively provided on both sides of the compression spring seat bottom plate (506), and a vertically arranged guide shaft (512) is provided in the through hole, and the guide shaft (512) is fixedly connected to the trolley frame (201).

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

7. A converter oxygen lance double anti-falling trolley according to claim 6, characterized in that: A guide groove (513) is provided at the upper end of the long anti-fall brake rod (511) along the length direction, and the pressure column (507) is arranged in the guide groove (513) and is slidably connected to the guide groove (513).

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

9. A converter oxygen lance double anti-falling trolley according to claim 8, characterized in that: The upper outer sides of the two anti-falling device frames (606) are respectively plugged with latches (605), the latches (605) are inserted into the anti-falling device frames (606), one end of the short anti-falling brake rod (608) is located below the latches (605), the latches (605) press one end of the short anti-falling brake rod (608) downward, the other end of the short anti-falling brake rod (608) is connected to one end of a traction spring (609), and the other end of the traction spring (609) is fixedly connected to the oxygen gun trolley (2).

10. A converter oxygen lance double anti-falling trolley according to claim 9, characterized in that: The upper end of the latch (605) is fixedly connected to a 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); and the speed limiter wire rope (602) is fixedly connected to a counterweight (604) via the speed limiter (601) and the counterweight track (7) in sequence.

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