Converter movable fume hood traction failure alarm device

Abstract

The utility model relates to a kind of converter movable smoke hood traction failure alarm device, including steel wire rope broken signal alarm mechanism and reel steel wire rope anti-drop groove mechanism;Wherein, the steel wire rope broken signal alarm mechanism includes proximity switch I, support, mobile knock ruler, fixed pulley and steel wire rope;The fixed pulley is provided with two groups, and is respectively installed in the front and rear sides above movable smoke hood rear end;The steel wire rope is fixedly connected with the end of any one iron chain of movable smoke hood top rear side, and the other end is sequentially passed two groups of fixed pulley and is fixedly connected with mobile knock ruler;The proximity switch I is fixed in the rear side above mobile knock ruler by support;The reel steel wire rope anti-drop groove mechanism is set in the main reel steel wire rope export of movable smoke hood winch system.The utility model can alarm the traction failure condition of movable smoke hood in time, maximum limit avoids movable smoke hood failure, non-planned shutdown, coal gas leakage, workshop smoke dust deposition and other problems caused by steel wire rope, iron chain and accessory damage.

Description

Technical Field

[0001] This utility model relates to the field of converter electromechanical equipment technology, and in particular to a converter movable fume hood traction failure alarm device. Background Technology

[0002] The converter consists of major equipment and facilities such as the converter body, oxygen lance system, power water system, and flue system. The flue is specifically divided into seven parts: movable hood, fixed section, movable section, and terminal section. Each part is formed by bending seamless steel pipes. The flue cross-section is circular with a pitch circle diameter of approximately φ3000. The flue gas velocity is approximately 22 m / s, and the total length of the flue is approximately 44 m.

[0003] The lifting and lowering of the movable fume hood is controlled by a motor-driven reducer, which uses a winch to control four iron chains pulling the hood, lifting a weight of 10 tons. Main components include... Figure 1 As shown, it includes a motor, reducer, drum assembly, pulley assembly, brake, coupling, etc. Its working principle is as follows: When molten iron is added to the converter and the furnace is rocked, the movable fume hood is in the raised position to allow space for converter movement. During converter blowing, the movable fume hood needs to be lowered to the furnace mouth position to prevent gas from leaking into the workshop through the gap between the movable fume hood and the furnace mouth during the blowing process. Figure 2 As shown.

[0004] Because converter blowing is intermittent, the fume hood needs to be raised and lowered frequently during the blowing process. This leads to the risk of sudden breakage of the wire rope or iron chain during production, causing the fume hood to sink, the furnace mouth to squeeze and deform the fume hood, resulting in damage to the fume hood, untimely gas recovery, waste of resources, and smoke and dust overflow, causing economic losses.

[0005] Therefore, there is an urgent need to design a set of alarm devices for fume hood failure to solve problems such as flue gas leakage, untimely gas recovery, and safety of operation and passage in the converter platform area. Summary of the Invention

[0006] To address the aforementioned problems, the purpose of this utility model is to provide an alarm device for the failure of the movable fume hood traction in a converter, which can minimize problems such as hood failure, unplanned shutdowns, gas leaks, and dust accumulation in the workshop caused by damage to wire ropes, chains, and accessories.

[0007] The technical solution adopted in this utility model is as follows: This utility model proposes a converter movable fume hood traction failure alarm device, including a wire rope breakage signal alarm mechanism and a drum wire rope anti-drop mechanism; wherein, the wire rope breakage signal alarm mechanism includes a proximity switch I, a bracket, a movable striker, fixed pulleys and a wire rope; the fixed pulleys are provided in two sets, respectively installed on the front and rear sides above the rear end of the movable fume hood; the wire rope is fixedly connected to the end of any iron chain on the rear side of the top of the movable fume hood, and the other end passes through the two sets of fixed pulleys in sequence and is fixedly connected to the movable striker; the proximity switch I is fixed above the rear side of the movable striker by the bracket; the drum wire rope anti-drop mechanism is set at the main winding wire rope outlet of the movable fume hood hoisting system.

[0008] Furthermore, the anti-drop mechanism for the wire rope drum includes a drum, a drum support, a proximity switch II, a fixing frame, and a base; the base is located below the main wire rope; the drum spans across the top of the main wire rope; drum supports are symmetrically arranged at the left and right ends of the drum; the upper end of the drum support is fixedly connected to the end of the drum, and the lower end is rotatably connected to the rear end of the base through a bearing; the proximity switch II is located above the front side of the base through the fixing frame and corresponds to the upper front side of the drum support.

[0009] Furthermore, the front middle part of the roller support is connected to the middle part of the base by a spring. The spring provides a forward pulling force to the roller support, thereby making the roller stick tightly to the main coiled wire rope.

[0010] Furthermore, a fixing block is provided on the upper front side of the roller bracket at a position corresponding to the proximity switch II.

[0011] Furthermore, the support is a steel structure support.

[0012] Furthermore, the movable striking ruler is made of thick steel plate.

[0013] Compared with the prior art, the present invention has the following beneficial effects: With the implementation of this device, alarms can be promptly triggered in case of traction failure of the movable fume hood, minimizing problems such as hood failure, unplanned shutdown, gas leakage, and dust accumulation in the workshop caused by damage to wire ropes, chains, and accessories. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the existing hoisting system for controlling the raising and lowering of the movable smoke hood; Figure 2 This is a schematic diagram illustrating the working principle of the movable fume hood; Figure 3 This is a schematic diagram of the installation structure of the wire rope breakage signal alarm device in this utility model; Figure 4This is a schematic diagram of the installation structure of the anti-drop-groove device for the steel wire rope drum in this utility model; Figure 5 yes Figure 4 Enlarged structural schematic diagram of the anti-drop-from-groove device for steel wire rope on medium drum; Figure 6 This is a schematic diagram illustrating the working principle of the anti-drop-from-groove device for steel wire rope drums.

[0015] In the attached drawings, the following reference numerals are used: 1-Proximity switch I; 2-Steel structure support; 3-Moving striker; 4-Fixed pulley; 5-Wire rope; 6-Drum; 7-Drum support; 8-Proximity switch II; 9-Fixed frame; 10-Base; 11-Movable fume hood; 12-Main winding wire rope; 13-Fixing block; 14-Spring. Detailed Implementation

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] It should be noted that in the description of this utility model, the terms "upper", "lower", "top", "bottom", "one side", "the other side", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not mean that the device or component must have a specific orientation, or be constructed and operated in a specific orientation.

[0018] The control system of the movable fume hood 11 is driven by a main drum motor. The upper and lower limit stop rulers are fixed on the main drive shaft. The upper and lower limits of the fume hood are controlled by the forward and reverse lifting of the main drive shaft, thereby achieving the interlocking requirement between the fume hood and the converter: when the fume hood is at the lower limit, the converter cannot tilt.

[0019] This control method has certain equipment defects. If the main coil wire rope or guide chain breaks, causing the fume hood to sink, the lower limit switch of the fume hood cannot be connected, which will lead to the failure of the interlock between the fume hood and the converter.

[0020] To address these shortcomings, a movable fume hood traction failure alarm device has been invented, which takes the following measures while maintaining the original control method unchanged: The present invention proposes a converter movable fume hood traction failure alarm device, which includes a wire rope breakage signal alarm mechanism and a drum wire rope anti-drop mechanism.

[0021] Among them, such as Figure 3As shown, the wire rope breakage alarm mechanism includes a proximity switch I1, a steel structure support 2, a movable striker 3, fixed pulleys 4, and a wire rope 5. In this embodiment, two sets of fixed pulleys 4 are provided, which are fixedly installed on the front and rear sides above the rear end of the movable smoke hood 11, respectively. The wire rope 5 is fixedly connected to the end of any iron chain on the rear side of the top of the movable smoke hood 11, and the other end passes through the two sets of fixed pulleys 4 in sequence and is fixedly connected to the movable striker 3. In this embodiment, the movable striker 3 is a counterweight thick steel plate. The proximity switch I1 is fixed above the rear side of the movable striker 3 through the steel structure support 2. When the movable smoke hood 11 breaks through the lowest limit position downwards, the wire rope 5 can drive the movable striker 3 to approach the proximity switch I1, thereby triggering the alarm.

[0022] To ensure the effectiveness of the alarm device, two sets of wire rope breakage alarm mechanisms can be set up, located near the main coiled wire rope 12, corresponding to the two iron chains on the rear side of the top of the movable fume hood 11 respectively.

[0023] When a sudden accident such as weld failure or breakage occurs in the main coiled steel wire rope 12 or iron chain of the movable fume hood 11, causing the movable fume hood 11 to fall below the lower limit position, the steel wire rope 5 will simultaneously pull the movable impact ruler 3 upward. The movable impact ruler 3 will approach the proximity switch I1 and trigger the alarm function in time.

[0024] The anti-drop mechanism for the drum wire rope is installed at the outlet of the main winding wire rope 12 of the hoisting system of the movable smoke hood 11.

[0025] like Figures 4-6 As shown, the anti-drop mechanism for the wire rope drum includes a drum 6, a drum support 7, a proximity switch II8, a fixing frame 9, and a base 10. The base 10 is positioned at a certain distance below the extended portion of the main wire rope 12. The drum 6 spans across the top of the main wire rope 12. Drum supports 7 are symmetrically arranged at the left and right ends of the drum 6. The upper ends of the two drum supports 7 are fixedly connected to the left and right ends of the drum 6, respectively, and the lower ends are rotatably connected to the left and right ends of the rear side of the base 10 through bearings. The proximity switch II8 is positioned above the front area of ​​the base 10 through the fixing frame and corresponds to the upper front part of one drum support 7. In this embodiment, a fixing block 13 is provided at the upper front part of one drum support 7 corresponding to the position of the proximity switch II8.

[0026] In this embodiment, the front middle part of one side of the roller support 7 is connected to the middle part of the base 10 by a spring 14. The spring 14 can give the roller support 7 a forward pulling force, so that the roller 6 is always in close contact with the main coiled wire rope 12.

[0027] To ensure the effectiveness of the alarm device, two sets of anti-drop-from-the-groove mechanisms for the drum wire rope can be set up, each corresponding to one of the two main winding wire ropes 12.

[0028] When the chain of the movable fume hood 11 breaks due to a malfunction and descends to the lowest position, the state of the upper main winding steel wire rope 12 changes from taut and pulled to loose state instantly. At this time, under the action of the spring 14, the roller bracket 7 is pulled to move towards the proximity switch II8. The fixing block 13 hits the proximity switch II8, thereby triggering the alarm function.

[0029] Matters not covered in this utility model are common knowledge.

[0030] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. A converter movable hood traction failure alarm device, characterized in that: The device includes a wire rope breakage signal alarm mechanism and a drum wire rope anti-drop mechanism; wherein, the wire rope breakage signal alarm mechanism includes a proximity switch I, a bracket, a movable striker, fixed pulleys, and a wire rope; two sets of fixed pulleys are provided, respectively installed on the front and rear sides above the rear end of the movable smoke hood; the wire rope is fixedly connected to the end of any iron chain on the rear side of the top of the movable smoke hood, and the other end passes through the two sets of fixed pulleys in sequence before being fixedly connected to the movable striker; the proximity switch I is fixed above the rear side of the movable striker by the bracket; the drum wire rope anti-drop mechanism is located at the main winding wire rope outlet of the movable smoke hood hoisting system.

2. A converter movable hood traction failure alarm device according to claim 1, characterized in that: The anti-drop mechanism for the wire rope drum includes a drum, a drum support, a proximity switch II, a fixing frame, and a base. The base is located below the main wire rope. The drum spans across the top of the main wire rope. Drum supports are symmetrically arranged at the left and right ends of the drum. The upper end of the drum support is fixedly connected to the end of the drum, and the lower end is rotatably connected to the rear end of the base through a bearing. The proximity switch II is located above the front side of the base through the fixing frame and corresponds to the upper front side of the drum support.

3. A converter movable hood traction failure alarm device according to claim 2, characterized in that: The front middle of the roller support is connected to the middle of the base by a spring. The spring provides a forward pulling force to the roller support, so that the roller is tightly attached to the main coiled wire rope.

4. The converter movable hood traction failure alarm device according to claim 2, characterized in that: A fixing block is provided on the upper front side of the roller support, corresponding to the position of proximity switch II.

5. The mobile hood traction failure alarm device of claim 1, wherein: The support structure is a steel structure support.

6. The mobile hood traction failure warning device for a converter according to claim 1, characterized in that: The movable striking ruler is made of thick steel plate.

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