Converter oxygen lance protection device
Through the combination of speed limiter and centrifugal hammer, reliable braking of the oxygen gun protection device is achieved, solving the unreliable problem of rails and braking of the existing devices, reducing the risk of falling and top-up of the oxygen gun, ensuring safe production and reducing costs.
Patent Information
- Application Number
- CN202422248499.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-13
- Publication Date
- 2025-09-02
- Estimated Expiration
- 2034-09-13
AI Technical Summary
The existing oxygen gun protection device is prone to jamming the rails without braking, the braking is unreliable and the success rate is not high, which affects the production rhythm. At the same time, the cost is high, and there is a safety hazard of oxygen gun falling and rushing to the top.
The anti-falling device of the speed limiter, centrifugal hammer, brake rack and brake wire rope, as well as the anti-rushing device of the connecting rod mechanism, elastic parts and brake mechanism, can realize reliable braking through the speed limiter control and the ejection of the centrifugal hammer and contact with the brake rack to prevent the oxygen gun from falling; the rapid braking of the oxygen gun trolley is achieved through the coordination of the connecting rod mechanism and the brake wedge to prevent the oxygen gun from rushing to the top.
It improves the braking reliability and success rate of the oxygen gun protection device, reduces the risk of the oxygen gun falling and hitting the top, ensures safe production, does not affect the normal production rhythm, and reduces production costs.
Smart Images
Figure CN223292577U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of steelmaking in the metallurgical industry, in particular to a converter oxygen lance protection device. Background Art
[0002] During the converter steelmaking process, the oxygen lance's position and its elevation and lowering are key factors determining smelting quality and raw material consumption. During the converter steelmaking process, the oxygen lance must enter the converter furnace to smelt the molten iron within a short period of time. This places high demands on the lance and the transmission mechanism that drives it upward and downward. Because the lance's lifting mechanism operates frequently and constantly in harsh environments exposed to high temperatures, vibration, and metal dust, the steel wire rope used to raise and lower the lance is susceptible to sudden breakage. A broken wire rope causes the lance to fall, and the immense impact can cause the high-pressure water and oxygen pipes to break. Furthermore, if the lance falls into the furnace and becomes immersed in the molten steel, it can cause a serious explosion.
[0003] At the same time, during the production process, it is easy for the emergency gun lifting command to be mistakenly triggered due to human error or abnormal numerical values. Improper oxygen gun control may cause the oxygen gun to run at high speed, leading to serious accidents such as oxygen gun top impact, posing a major safety hazard.
[0004] Therefore, the falling or top impact of the oxygen lance is a major safety hazard in the converter steel plant. In order to prevent similar accidents from happening, relevant practitioners have designed and manufactured protective devices such as oxygen lance anti-falling and anti-top impact with different structures.
[0005] The main drawbacks of existing oxygen lance protection devices are: they can get stuck when braking isn't necessary; when braking is required, it's unreliable, with a low success rate and a high degree of randomness; and if braking is successful, the locking mechanism can make it difficult to release the brake, impacting production. Furthermore, they are expensive. Utility Model Content
[0006] The main purpose of the utility model is to provide a converter oxygen lance protection device, aiming to improve the braking reliability of the converter oxygen lance and at the same time having low cost.
[0007] To achieve the above object, the utility model provides a converter oxygen lance protection device, including an anti-falling device for braking the oxygen lance trolley, the anti-falling device including a speed limiter, a centrifugal hammer, a brake rack and a brake wire rope, wherein:
[0008] The brake wire rope is wound around the speed limiter and both ends of the brake wire rope are connected to the drum on the oxygen gun trolley. The speed limiter is supported on the mounting bracket and can rotate relative to it. A sleeve is fixed on the side of the speed limiter, and a centrifugal hammer is fixed inside the sleeve. A brake rack is provided on the side wall of the sleeve. When the speed of the speed limiter exceeds the preset value, the centrifugal hammer pops out and contacts the brake rack to prevent the speed limiter from rotating.
[0009] Preferably, a groove is formed on the outer side wall of the sleeve, and the brake wire rope passes through the groove and is connected to the drum on the oxygen lance trolley.
[0010] Preferably, a fixed shaft extends from the side of the speed limiter, the centrifugal hammer is sleeved on the outside of the fixed shaft, and the fixed shaft is located inside the sleeve.
[0011] Preferably, the fixed shaft is detachably connected to the centrifugal hammer.
[0012] Preferably, the converter oxygen lance protection device further comprises an anti-top-impact device for braking the lifting wire rope on the oxygen lance trolley.
[0013] Preferably, the anti-top impact device includes a connecting rod mechanism, an elastic member and a braking mechanism, wherein the connecting rod mechanism includes a connecting rod and a rotating shaft passing through the connecting rod to support its rotation, the two ends of the elastic member are respectively fixedly connected to the middle part of the connecting rod and the top of the oxygen gun trolley, and the end of the connecting rod is connected to the braking mechanism to provide braking force.
[0014] Preferably, the braking mechanism includes an inner brake wedge and an outer brake wedge sleeved on the outside of the inner brake wedge. The lifting wire rope passes through the middle through hole of the inner brake wedge. When the outer brake wedge is subjected to the braking force of the connecting rod, it drives the inner brake wedge to clamp the lifting wire rope.
[0015] Preferably, all lifting wire ropes of the oxygen lance trolley are correspondingly provided with a brake mechanism.
[0016] Preferably, the elastic member is a spring.
[0017] Preferably, the rotating shaft is fixedly mounted on the support seat.
[0018] The converter oxygen lance protection device proposed by the utility model is not prone to track jamming when braking is not required; when braking is required, its braking is reliable and has a high success rate. In addition, after braking is successful, it is easy to release the brake, so it will not affect the normal production rhythm. At the same time, it has a simple structure and low production cost. In addition, the converter oxygen lance protection device can greatly reduce the risk of the oxygen lance falling or hitting the top, achieving safe production in the true sense. The converter oxygen lance protection device has a wide range of applications and is widely used in various types of steel enterprises, ensuring the safety of people's lives and property. It marks a new step in the safe production of steel enterprises. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 This is a structural diagram of a preferred embodiment of the converter oxygen lance protection device of the utility model;
[0020] Figure 2 A schematic structural diagram of the anti-fall device in the converter oxygen lance protection device of the utility model in a non-braking state;
[0021] Figure 3 A schematic structural diagram of the anti-fall device in the converter oxygen lance protection device of the utility model in the braking state;
[0022] Figure 4 A schematic structural diagram of the anti-top impact device in the converter oxygen lance protection device of the utility model in a non-braking state;
[0023] Figure 5 A schematic structural diagram of the anti-top impact device in the converter oxygen lance protection device of the utility model in a braking state.
[0024] In the figure, 1-converter oxygen lance protection device; 2-oxygen lance trolley; 3-speed limiter; 301-centrifugal hammer; 302-brake rack; 4-brake wire rope; 5-anti-top impact device; 501-connecting rod mechanism; 502-spring; 6-inner brake wedge; 7-outer brake wedge; 8-lifting wire rope.
[0025] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION
[0026] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.
[0027] It should be noted that in the description of the present invention, the terms "transverse," "longitudinal," "upper," "lower," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer" and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely for the purpose of facilitating the description of the present invention and simplifying the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0028] Reference Figures 1 to 3 In this preferred embodiment, a converter oxygen lance protection device includes an anti-falling device for braking the oxygen lance trolley 2, the anti-falling device includes a speed limiter 3, a centrifugal hammer 301, a brake rack 302 and a brake wire rope 4, wherein,
[0029] The brake wire rope 4 is wound around the speed governor 3 and both ends of the brake wire rope are connected to the reel on the oxygen gun trolley 2 (the reel stores the brake wire rope 4). The speed governor 3 is supported on the mounting bracket and can rotate relative to it. A sleeve is fixed to the side of the speed governor 3, and a centrifugal hammer 301 is fixed inside the sleeve. A brake rack 302 is provided on the side wall of the sleeve. When the speed of the speed governor 3 exceeds the preset value, the centrifugal hammer 301 pops out and contacts the brake rack 302 to prevent the speed governor 3 from rotating.
[0030] The speed limiter 3 is located in the center area above the oxygen lance trolley 2. The centrifugal hammer 301 can be mounted with a spring and held in place by a rope. This creates a balance between the tension and the spring force, preventing it from deflecting and triggering braking. At high speeds, the high-speed rotation generates a significant centrifugal force, disrupting this balance. This spring can instantly deflect the centrifugal hammer 301, causing it to collide with the brake rack 302. The brake wire rope 4 then pulls the oxygen lance trolley 2, halting its fall. The centrifugal hammer 301 has a similar structure to that found in elevator cars.
[0031] Furthermore, a groove is formed on the outer side wall of the sleeve, and the brake wire rope 4 is connected to the drum on the oxygen gun trolley 2 after passing through the groove. The brake wire rope 4 is accommodated in the groove, so the brake wire rope 4 is not easy to loosen relative to the speed governor 3.
[0032] In this embodiment, a fixed shaft extends from the side of the speed governor 3 , the centrifugal hammer 301 is sleeved on the outside of the fixed shaft, and the fixed shaft is located inside the sleeve.
[0033] The fixed shaft is detachably connected to the centrifugal hammer 301 , thereby facilitating replacement and maintenance of the centrifugal hammer 301 .
[0034] In this embodiment, the converter oxygen lance protection device further includes an anti-collision device 5 for braking the lifting wire rope 8 on the oxygen lance trolley 2. In production, there may be situations where, due to human error or abnormal external data, the oxygen lance trolley 2 rises rapidly. When the position of the oxygen lance trolley 2 exceeds the preset position, the anti-collision device 5 is triggered to clamp the lifting wire rope 8, thereby quickly stopping the oxygen lance trolley 2.
[0035] Preferably, the anti-top impact device 5 includes a connecting rod mechanism 501, an elastic member and a braking mechanism, wherein the connecting rod mechanism 501 includes a connecting rod and a rotating shaft passing through the connecting rod to support its rotation, the two ends of the elastic member are fixedly connected to the middle part of the connecting rod and the top of the oxygen gun trolley 2 respectively, and the end of the connecting rod is connected to the braking mechanism to provide braking force.
[0036] This embodiment proposes a specific braking mechanism structure: the braking mechanism comprises an inner brake wedge 6 and an outer brake wedge 7 that fits over the inner brake wedge 6. A lifting wire rope 8 passes through a central through-hole in the inner brake wedge 6. When subjected to the braking force of a connecting rod, the outer brake wedge 7 drives the inner brake wedge 6 to clamp the lifting wire rope 8. Each lifting wire rope 8 of the oxygen lance trolley 2 is provided with a corresponding brake mechanism (two brake mechanisms are shown in the figure). The coordination between the inner brake wedge 6 and the outer brake wedge 7 is similar to the common mechanism used in automobile brakes, and therefore, will not be described in detail in this embodiment.
[0037] In this embodiment, the elastic member is a spring. The rotating shaft is fixedly installed on the supporting seat.
[0038] During normal lifting and lowering, the connecting rod mechanism 501, as well as the inner and outer brake wedges 6 and 7 in the anti-collision device 5, are fixed at the highest limit position of the oxygen lance trolley 2. The lower end of the spring is fixed to the top of the oxygen lance trolley 2. When the oxygen lance trolley 2 is lifting and lowering, the spring is in normal working condition (the spring compression and extension can be adjusted as needed). At this time, the spring force is sufficient to keep the inner and outer brake wedges 7 in the non-braking state, and will not affect the lifting and lowering of the oxygen lance trolley 2.
[0039] When the oxygen gun trolley 2 rises to the limit height and does not stop, the spring will continue to be compressed. At this time, the upward elastic force ( Figure 4 F1) in the middle increases continuously, thus breaking the balance in the non-braking state. According to the lever principle, the other end of the connecting rod mechanism 501 will exert a downward force ( Figure 5 Under the action of force F2, the outer brake wedge 7 moves downward, thereby tightening the inner brake wedge 6 and putting it in a braking state, achieving the effect of braking the oxygen lance trolley 2 and preventing the oxygen lance from hitting the top.
[0040] The working process of this converter oxygen lance protection device is as follows.
[0041] During normal operation, the speed governor 3 and the centrifugal hammer 301 rotate synchronously and coaxially at a low, uniform speed as the oxygen lance trolley 2 ascends and descends, while the brake rack 302 remains stationary. Due to the low rotational speed, the centrifugal hammer 301 remains retracted and does not spring open to collide with the brake rack 302 inside the speed governor 3.
[0042] The daily lifting work of the oxygen lance trolley 2 is completed by the traction of the lifting wire rope 8. When the lifting wire rope 8 suddenly breaks, the oxygen lance trolley 2 falls rapidly. At this time, the speed of the speed limiter 3 increases sharply. Since the speed limiter 3 and the centrifugal hammer 301 are coaxial structures, the speed of the centrifugal hammer 301 also increases sharply. Under the action of centrifugal force, the centrifugal hammer 301 will be triggered and expand outwards rapidly, colliding with the slot of the brake rack 302 inside the sleeve of the speed limiter 3, thereby stopping the speed limiter 3 and the centrifugal hammer 301 from rotating. Then, the brake wire rope 4 pulls the oxygen lance trolley 2 to stop falling. Figure 3 The braking status is shown in the figure.
[0043] In addition, the following situation also exists in production: due to human error or abnormal external data, the oxygen lance trolley 2 rises rapidly. When the position of the oxygen lance trolley 2 exceeds the preset position, the anti-top device 5 will be triggered to clamp the lifting wire rope 8, thereby causing the oxygen lance trolley 2 to stop quickly.
[0044] The converter oxygen lance protection device proposed in this embodiment is not prone to track jamming when braking is not required; when braking is required, its braking is reliable and has a high success rate. In addition, after braking is successful, it is easy to release the brakes, so it will not affect the normal production rhythm. At the same time, it has a simple structure and low production cost. In addition, the converter oxygen lance protection device can greatly reduce the risk of the oxygen lance falling or hitting the top, achieving safe production in the true sense. The converter oxygen lance protection device has a wide range of applications and is widely used in various types of steel enterprises, ensuring the safety of people's lives and property. It marks a new step in the safe production of steel enterprises.
[0045] The above are only preferred embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.
Claims
1. A converter oxygen lance protection device, characterized in that: It includes an anti-falling device for braking the oxygen gun trolley, which includes a speed limiter, a centrifugal hammer, a brake rack and a brake wire rope, wherein: The brake wire rope is wound around the speed limiter and both ends of the brake wire rope are connected to the drum on the oxygen gun trolley. The speed limiter is supported on the mounting bracket and can rotate relative to it. The speed limiter is a sleeve structure, a centrifugal hammer is fixed inside the sleeve, and a brake rack is provided on the side wall of the sleeve. When the speed of the speed limiter exceeds the preset value, the centrifugal hammer pops out and contacts the brake rack to prevent the speed limiter from rotating.
2. The converter oxygen lance protection device according to claim 1, characterized in that: A groove is formed on the outer side wall of the sleeve, and the brake wire rope passes through the groove and is connected to the drum on the oxygen gun trolley.
3. The converter oxygen lance protection device according to claim 1, characterized in that: A fixed shaft extends out from the side of the speed limiter, the centrifugal hammer is sleeved on the outside of the fixed shaft, and the fixed shaft is located inside the sleeve.
4. The converter oxygen lance protection device according to claim 3, characterized in that: The fixed shaft is detachably connected to the centrifugal hammer.
5. The converter oxygen lance protection device according to claim 1, characterized in that: It also includes an anti-top impact device for braking the lifting wire rope on the oxygen gun trolley.
6. The converter oxygen lance protection device according to claim 5, characterized in that: The anti-collision device includes a connecting rod mechanism, an elastic member and a braking mechanism, wherein the connecting rod mechanism includes a connecting rod and a rotating shaft passing through the connecting rod to support its rotation, the two ends of the elastic member are fixedly connected to the middle part of the connecting rod and the top of the oxygen gun trolley respectively, and the end of the connecting rod is connected to the braking mechanism to provide braking force.
7. The converter oxygen lance protection device according to claim 6, characterized in that: The braking mechanism includes an inner brake wedge and an outer brake wedge sleeved outside the inner brake wedge. The lifting wire rope passes through the middle through hole of the inner brake wedge. When the outer brake wedge is subjected to the braking force of the connecting rod, it drives the inner brake wedge to clamp the lifting wire rope.
8. The converter oxygen lance protection device according to claim 7, characterized in that: All lifting wire ropes of the oxygen lance trolley are equipped with a corresponding brake mechanism.
9. The converter oxygen lance protection device according to claim 6, characterized in that: The elastic member is a spring.
10. The converter oxygen lance protection device according to any one of claims 6 to 9, characterized in that: The rotating shaft is fixedly installed on the supporting seat.