Fixed pulley steel wire rope groove disengaging early warning and protecting device
By installing a displacement sensor and a spring structure in the fixed pulley assembly, the timely alarm is achieved after the wire rope is descavated, and the problem of the pulley shaft being cut after the wire rope of the fixed pulley assembly is descavated, ensuring the safe operation of the crane.
Patent Information
- Application Number
- CN202422150099.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-03
- Publication Date
- 2025-07-01
- Estimated Expiration
- 2034-09-03
AI Technical Summary
In the prior art, the fixed pulley assembly is prone to contact the pulley shaft directly after the wire rope is unrotated, resulting in the pulley shaft being cut, posing a safety hazard and being difficult to detect in time.
A fixed pulley wire rope detachment warning and protection device is designed. By installing a displacement sensor and a spring structure in the pulley assembly, the sliding plate and roller are used to cooperate to realize the alarm in time after the wire rope is detached and prevent the wire rope from becoming tighter and tighter, so as to avoid damage to the pulley shaft.
Effectively prevent the wire rope from being disconnected and hung directly on the pulley shaft, alarming in time, preventing the accident from amplifying, and ensuring the safe operation of the equipment.
Smart Images
Figure CN223047120U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of fixed pulleys, and particularly relates to a fixed pulley wire rope derailment warning and protection device. Background Technique
[0002] Lifting cranes belong to special equipment, and their importance is self-evident. As a periodically vulnerable part of them, the normal service life of wire ropes determines the safety of the equipment. The reasons for the damage of wire ropes, except for normal wear, quality problems, overload, scratching, and high temperature, are only the extrusion caused by derailment. And derailment is a type of fault that is not easy to detect and has a relatively high failure rate among these faults.
[0003] Generally, a fixed pulley assembly usually includes a pulley shaft, pulley discs, a fixing frame, and a wire rope. The pulley discs are rotatably sleeved on the pulley shaft, the pulley shaft is fixed on the fixing frame, and the wire rope is hung on the pulley discs.
[0004] When the wire rope derails, it will directly contact the pulley shaft. If not discovered in time and used for a long time, the pulley shaft will be cut off, and the pulley, hook head, and load will cause a high-altitude fall, resulting in a major safety accident. Summary of the Invention
[0005] The purpose of the utility model is to provide a fixed pulley wire rope derailment warning and protection device to solve the problems existing in the prior art.
[0006] The technical solution adopted by the utility model to solve its technical problems is:
[0007] A fixed pulley wire rope derailment warning and protection device includes a fixed pulley assembly. The fixed pulley assembly is provided with a pulley shaft, and a plurality of pulley discs are rotatably sleeved on the pulley shaft. The pulley shaft is fixed on a fixing frame, and a wire rope is hung on the pulley discs. A plurality of rotating wheels are fixed on the inner side of the upper part of the fixing frame. Two side plates and a middle plate are welded on the inner side of the upper part of the fixing frame. A plurality of sliding rods are welded between the two side plates and the middle plate. Springs are sleeved on the sliding rods. A sliding plate is commonly sleeved on a plurality of sliding rods between the same side plate and the middle plate. A displacement sensor is installed on the sliding plate.
[0008] Furthermore, the fixing frame is of an inverted U-shaped structure. A plurality of vertical rods are welded on the lower side of the top of the inverted U-shaped structure of the fixing frame. The bottom ends of the vertical rods extend between the pulley discs and between the pulley discs and the fixing frame. The shaft ends of the rotating wheels are welded to the bottom ends of the vertical rods, and the rotating wheels are fixed on the fixing frame through the vertical rods.
[0009] Furthermore, two rotating wheels are welded to the bottom end of the vertical rod between the pulley discs, and the shaft ends of the two rotating wheels face the pulley discs on both sides respectively. One rotating wheel is welded to the bottom end of the vertical rod between the pulley disc and the fixing frame, and the shaft end of the rotating wheel faces the pulley disc.
[0010] Furthermore, the side plates and the middle plate are parallel to the pulley shaft. The two side plates are respectively located on both sides of the bottom end of the inverted U-shaped structure of the fixing frame, and the middle plate is located at the middle position of the bottom end of the inverted U-shaped structure of the fixing frame.
[0011] Furthermore, the side plates are all located outside the steel wire rope, the sliding plate is located inside the steel wire rope, the position of the sliding rod is staggered from the position of the steel wire rope, and a number of vertically penetrating gaps are formed among the sliding plate, the side plates and the sliding rod, and the steel wire ropes respectively pass through the corresponding gaps.
[0012] Furthermore, one end of the spring is welded to the middle plate, and the other end of the spring is welded to the sliding plate.
[0013] Furthermore, a number of through holes are provided on the sliding plate, the sliding rod passes through the corresponding through holes, and the sliding plate is sleeved on the sliding rod through the through holes.
[0014] The utility model has the following beneficial effects:
[0015] 1. The utility model can prevent the fixed pulley assembly of the crane from being directly hung on the pulley shaft and tightened more and more after the steel wire rope comes out of the groove, and can alarm in time after the steel wire rope comes out of the groove, so as to prevent the accident from further expanding.
[0016] 2. There is a roller corresponding to both sides of each pulley piece, and there is no obstruction in the middle. When the steel wire rope comes out of the groove, the steel wire rope can be hung on the roller without any obstruction, thus avoiding the steel wire rope hanging on the pulley shaft and cutting off the pulley shaft.
[0017] 3. No matter which steel wire rope of the fixed pulley assembly comes out of the groove, it will drive the sliding plate to move, thus triggering the displacement sensor to alarm, and stopping the hoisting operation through the control system of the crane, so as to prevent the steel wire rope from being tightened more and more after coming out of the groove and causing further damage to the equipment.
[0018] 5. When the fixed pulley assembly operates normally, since the steel wire rope passes through a number of vertically penetrating gaps formed among the sliding plate, the side plates and the sliding rod, it will not affect the operation of the fixed pulley group.
[0019] 6. No matter from which side of the pulley piece the steel wire rope comes out of the groove, there will be a corresponding roller to catch it, thus preventing the steel wire rope from hanging on the pulley shaft and cutting off the pulley shaft. Description of the Drawings
[0020] Figure 1 is a schematic structural diagram of the position of the top runner of the utility model.
[0021] Figure 2 is a schematic structural diagram of the position of the bottom sliding rod of the utility model.
[0022] Figure 3 is a front view structural schematic diagram of the utility model.
[0023] Figure 4 This is the schematic diagram of the upward view structure of the utility model.
[0024] Wherein: 1. Fixed pulley assembly; 2. Pulley shaft; 3. Pulley piece; 4. Fixed frame; 5. Steel wire rope; 6. Runner; 7. Side plate; 8. Intermediate plate; 9. Slide bar; 10. Spring; 11. Slide plate; 12. Displacement sensor; 13. Upright rod; 14. Through hole. Specific embodiments
[0025] In order to make the purpose, technical solutions and advantages of the present utility model clearer, the following further describes the present utility model in detail with reference to specific embodiments and the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.
[0026] As Figures 1-4 shown, a fixed pulley steel wire rope 5 out-of-groove warning and protection device includes a fixed pulley assembly 1. The fixed pulley group is provided with a pulley shaft 2, and a plurality of pulley pieces 3 are rotatably sleeved on the pulley shaft 2. The pulley shaft 2 is fixed on a fixed frame 4. A steel wire rope 5 is hung on the pulley piece 3. A plurality of runners 6 are fixed on the inner side of the upper part of the fixed frame 4. Two side plates 7 and an intermediate plate 8 are welded on the inner side of the upper part of the fixed frame 4. A plurality of slide bars 9 are welded between the two side plates 7 and the intermediate plate 8. Springs 10 are sleeved on the slide bars 9. A plurality of slide bars 9 between the same side plate 7 and the intermediate plate 8 are commonly sleeved with a slide plate 11. A displacement sensor 12 is installed on the slide plate 11. During use, the displacement sensor 12 is electrically connected to the control system of the lifting equipment and is associated with an alarm.
[0027] The fixed frame 4 is of an inverted U-shaped structure. A plurality of upright rods 13 are welded on the lower side of the top of the inverted U-shaped structure of the fixed frame 4. The bottom ends of the upright rods 13 extend between the pulley pieces 3 and between the pulley pieces 3 and the fixed frame 4. The shaft ends of the runners 6 are welded to the bottom ends of the upright rods 13. The runners 6 are fixed on the fixed frame 4 through the upright rods 13.
[0028] Two runners 6 are welded to the bottom ends of the upright rods 13 between the pulley pieces 3, and the shaft ends of the two runners 6 face the pulley pieces 3 on both sides respectively. One runner 6 is welded to the bottom end of the upright rod 13 between the pulley piece 3 and the fixed frame 4, and the shaft end of the runner 6 faces the pulley piece 3. That is to say, there is a roller corresponding to each side of each pulley piece 3 and there is no obstruction in the middle. When the steel wire rope 5 gets out of the groove, the steel wire rope 5 can be hung on the roller without any obstruction, thus avoiding the steel wire rope 5 hanging on the pulley shaft 2 and cutting off the pulley shaft 2.
[0029] The side plates 7 and the intermediate plate 8 are parallel to the pulley shaft 2. The two side plates 7 are respectively located on both sides of the bottom end of the inverted U-shaped structure of the fixed frame 4, and the intermediate plate 8 is located at the middle position of the bottom end of the inverted U-shaped structure of the fixed frame 4.
[0030] The side plates 7 are all located outside the steel wire ropes 5, the sliding plate 11 is located inside the steel wire ropes 5, the position of the sliding rod 9 is staggered from the position of the steel wire ropes 5, and a number of vertically penetrating gaps are formed among the sliding plate 11, the side plates 7 and the sliding rod 9, and the steel wire ropes 5 respectively pass through the corresponding gaps. In this way, no matter which steel wire rope 5 of the fixed pulley assembly 1 gets out of the groove, it will drive the sliding plate 11 to move, thereby triggering the displacement sensor 12 to alarm, and stopping the hoisting operation through the control system of the crane, so as to prevent the steel wire rope 5 from getting tighter and tighter after getting out of the groove and causing further damage to the equipment.
[0031] One end of the spring 10 is welded to the middle plate 8, and the other end of the spring 10 is welded to the sliding plate 11.
[0032] A number of through holes 14 are provided on the sliding plate 11, the sliding rod 9 passes through the corresponding through holes 14, and the sliding plate 11 is sleeved on the sliding rod 9 through the through holes 14.
[0033] The working principle of the present utility model is as follows:
[0034] Before use, the displacement sensor 12 is electrically connected to the control system of the hoisting equipment and associated with the alarm. When the fixed pulley assembly 1 is operating normally, since the steel wire ropes 5 pass through a number of vertically penetrating gaps formed among the sliding plate 11, the side plates 7 and the sliding rod 9, the operation of the fixed pulley group will not be affected.
[0035] When the steel wire rope 5 slips off, the steel wire rope 5 gets out of the groove of the pulley piece 3. No matter which side of the pulley piece 3 the steel wire rope 5 slips off from, it will fall on the corresponding roller. The roller is a U-shaped wheel. Therefore, the slipped steel wire rope 5 is hung on the U-shaped surface of the roller, thus avoiding the situation that the steel wire rope 5 is hung on the pulley shaft 2 after slipping off, and further preventing the pulley shaft 2 from being cut off and causing a safety accident.
[0036] At the same time when the steel wire rope 5 slips off, the steel wire ropes 5 on both sides of the pulley piece 3 will tighten towards the middle. When tightening, they will touch the sliding plate 11, thereby driving the sliding plate 11 to displace. After the displacement sensor 12 detects the displacement, it transmits a signal to the control system. The control system stops the hoisting operation and issues an alarm to prompt the staff to deal with it in time.
[0037] The embodiments described above are only used to describe the preferred embodiments of the present utility model, and do not limit the concept and scope of the present utility model. Without departing from the design concept of the present utility model, various variations and improvements made by those of ordinary skill in the art to the technical solutions of the present utility model shall all fall within the protection scope of the present utility model.
[0038] The technologies, shapes, and structures not described in detail in the present utility model are all well-known technologies.
Claims
1. A fixed pulley wire rope de-slotting warning and protection device, comprising a fixed pulley assembly, wherein the fixed pulley assembly is provided with a pulley shaft, a plurality of pulley pieces are rotatably sleeved on the pulley shaft, the pulley shaft is fixed on a fixed frame, and a wire rope is hung on the pulley piece, characterized in that: A plurality of rotating wheels are fixed on the inner side of the upper part of the fixing frame, two side plates and a middle plate are welded on the inner side of the upper part of the fixing frame, a plurality of sliding bars are welded between the two side plates and the middle plate, springs are sleeved on the sliding bars, a sliding plate is sleeved on the plurality of sliding bars between the same side plate and the middle plate, and a displacement sensor is installed on the sliding plate.
2. The fixed pulley wire rope de-slot warning and protection device according to claim 1 is characterized in that: The fixing frame is an inverted U-shaped structure, and a plurality of vertical poles are welded to the lower side of the top of the inverted U-shaped structure of the fixing frame. The bottom ends of the vertical poles extend between the pulley pieces and between the pulley pieces and the fixing frame. The shaft end of the rotating wheel is welded to the bottom end of the vertical pole, and the rotating wheel is fixed to the fixing frame through the vertical poles.
3. The fixed pulley wire rope de-slot warning and protection device according to claim 2 is characterized in that: Two rotating wheels are welded at the bottom end of the vertical pole between the pulley pieces, and the two rotating wheel shaft ends face the pulley pieces on both sides respectively; a rotating wheel is welded at the bottom end of the vertical pole between the pulley piece and the fixed frame, and the rotating wheel shaft end faces the pulley piece.
4. The fixed pulley wire rope de-slot warning and protection device according to claim 2, characterized in that: The side plates and the middle plate are parallel to the pulley shaft, the two side plates are respectively located on both sides of the bottom end of the inverted U-shaped structure of the fixed frame, and the middle plate is located in the middle position of the bottom end of the inverted U-shaped structure of the fixed frame.
5. The fixed pulley wire rope de-slot warning and protection device according to claim 4 is characterized in that: The side plates are all located on the outside of the wire rope, the slide plate is located on the inside of the wire rope, the position of the slide bar is staggered with the position of the wire rope, and a plurality of vertically penetrating gaps are formed between the slide plate, the side plates and the slide bar, and the wire ropes pass through the corresponding gaps respectively.
6. The fixed pulley wire rope de-slot warning and protection device according to claim 1, characterized in that: One end of the spring is welded to the middle plate, and the other end of the spring is welded to the slide plate.
7. The fixed pulley wire rope de-slot warning and protection device according to claim 1, characterized in that: The slide plate is provided with a plurality of through holes, the slide rods pass through the corresponding through holes, and the slide plate is sleeved on the slide rods through the through holes.