Movable safety protection device for aloft work
By using a combination of safety ropes and safety nets fixed to the crane in high-altitude operations at grain silos, the problem of traditional protective methods being unable to adapt to complex work paths has been solved, achieving efficient safety protection and flexible operation, and ensuring the safety of workers.
Patent Information
- Application Number
- CN202511884553.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-15
- Publication Date
- 2026-02-17
AI Technical Summary
In existing technologies, safety rope protection for high-altitude operations in grain silos is at risk of falling off. Traditional secondary protection methods, such as safety nets and guardrails, cannot adapt to complex operation paths, affecting operational flexibility and safety.
The system employs a first safety rope and a safety net suspension rope fixed to the crane, combined with a protective net, central support, and strut structure to form multiple safety protections. This ensures that workers do not occupy the space below the platform when moving at heights and effectively intercept falls. The protective net is quickly retracted via a safety wire.
It enables real-time response and effective interception of fall risks without affecting operational flexibility, improving the safety and compatibility of high-altitude operations and preventing further falls.
Smart Images
Figure CN121534339A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of grain storage maintenance technology, specifically a mobile safety protection device for high-altitude operations. Background Technology
[0002] In the grain storage industry, grain silos are core storage facilities, and their structural stability and equipment integrity directly affect the safety of grain storage. To ensure the long-term reliable operation of grain silos, regular high-altitude maintenance is indispensable, covering key aspects such as roof waterproofing and repair, ventilation equipment maintenance, and steel structure corrosion protection. Currently, the industry widely uses safety ropes as the primary means of protection for high-altitude operations. Workers secure safety ropes to pre-set anchor points on the silo roof, using the ropes for high-altitude positioning and fall protection.
[0003] However, in actual working scenarios, safety rope protection has significant limitations and cannot completely eliminate the risk of accidental falls. On the one hand, the complex structure of grain silo roofs, with insufficient anchor points or inadequate fixation in some areas, may lead to safety rope detachment. On the other hand, during mobile maintenance, workers need to frequently adjust the position of the safety rope, creating a brief window of opportunity for rope detachment. If a sudden slip or structural collapse occurs during this time, it will directly cause a fall. Furthermore, high-altitude operations in grain silos often involve large-scale movement and multi-angle operations. The restrictive nature of traditional safety ropes may affect operational flexibility, increase operational difficulty, and indirectly increase safety risks.
[0004] Given the aforementioned safety hazards, the industry's demand for secondary safety measures is increasingly urgent. Existing secondary protection methods are mostly static, such as laying safety nets and installing guardrails. While these can reduce fall injuries to some extent, they have significant drawbacks: safety nets require considerable space beneath the grain silo, hindering ground-level access and offering delayed response to moving workers; guardrails, limited by the work area, cannot adapt to the complex work paths on the grain silo roof, exhibiting poor compatibility. Therefore, developing a secondary safety solution that combines dynamic protection with operational compatibility has become a key direction for technological breakthroughs in the industry. This solution must achieve real-time response and effective interception of fall risks without affecting worker movement, filling the gaps in existing protection technologies and providing more comprehensive and reliable safety guarantees for high-altitude grain silo maintenance operations. Summary of the Invention
[0005] To address the problems in existing technologies, the present invention aims to provide a mobile safety protection device for high-altitude operations, solving the aforementioned issues described in the background section: Given the aforementioned safety hazards, the industry's demand for dual safety measures is increasingly urgent. Existing secondary protection methods are mostly static, such as laying safety nets and installing guardrails. While these can reduce fall injuries to some extent, they have significant drawbacks: safety nets require a large amount of space under the grain silo, affecting ground access and offering delayed response to moving workers; guardrails are limited by the work area and cannot adapt to the complex work paths on the grain silo roof, exhibiting poor compatibility. Therefore, developing a secondary safety guarantee solution that combines dynamic protection and operational compatibility has become a key direction for technological breakthroughs in the industry. This solution must achieve real-time response and effective interception of fall risks without affecting the movement and operation of workers, filling the gaps in existing protection technologies and providing a more comprehensive and reliable safety guarantee for high-altitude grain silo maintenance operations.
[0006] The technical problem to be solved by the present invention is achieved by the following technical solution: a mobile safety protection device for high-altitude operations, including a first safety rope and a safety net suspension rope fixed on a crane;
[0007] The system includes one first safety rope, with a worker suspended below it; and two safety net ropes, which pass through the worker's left and right sides respectively. A protective net is connected to the bottom of the two safety net ropes, and the protective net is located below the worker's body.
[0008] As a preferred embodiment of the present invention, the bottom end of the first safety rope is fixedly connected to a chest and shoulder strap and a waist and hip strap, which are respectively tied to the corresponding body parts of the worker.
[0009] As a preferred embodiment of the present invention, the left and right sides of the waist and hip strap are each provided with a locking ring for the safety net suspension rope to pass through. Each safety net suspension rope passes through the locking rings on the left and right sides of the waist and hip strap and is provided with two support rod ropes and one suspension rope downwards.
[0010] As a preferred embodiment of the present invention, the protective net includes a central support fixed below the safety net suspension rope, a lifting hook fixed at the top of the central support, and the lifting hook fixed to the end of the suspension rope passing below the locking ring; foldable and retractable protective net support rods are symmetrically arranged on the front and rear sides of the central support, and protective net hooks are provided at the top of the protective net support rods; the ends of the two support rod pull ropes passing below the locking ring are respectively fixed to the protective net hooks on the two protective net support rods.
[0011] As a preferred embodiment of the present invention, the protective net is laid flat on several net hooks supported by a central support and net support rods, and the protective net is a diamond-shaped mesh made of nylon.
[0012] As a preferred embodiment of the present invention, a lifting and sliding hinge support is provided at the bottom of the front and rear sides of the central support, and the bottom ends of the protective net support rods on the front and rear sides of the central support are hinged to the corresponding hinge support.
[0013] As a preferred embodiment of the present invention, the central support includes a sliding groove at the bottom of the central support, a movable block is slidably connected in the sliding groove, hinge supports on both sides are fixed to the two ends of the movable block, a through fuse hole is provided in the middle of the sliding groove, a fuse is inserted into the fuse hole, the fuse is intercepted below the movable block in the sliding groove, the two ends of the fuse extend out to the left and right sides of the central support through the fuse hole, and wire lugs are provided on the left and right sides of the central support, the two ends of the fuse extending to the left and right sides of the central support are wrapped around the corresponding wire lugs.
[0014] As a preferred embodiment of the present invention, a wire slot is provided at the middle position of the bottom surface of the movable block, and the wire slot is engaged with the fuse in the sliding slot.
[0015] As a preferred embodiment of the present invention, the bottom of the two central supports is provided with a fixed support rod to fix the relative position of the two central supports.
[0016] Compared with the prior art, the beneficial effects of the present invention are as follows:
[0017] I. This invention features a first safety rope and a safety net suspension rope fixed to a crane, providing independent suspension. During lifting, the safety net does not pull or compress the worker's body. One first safety rope is provided for suspending the worker, ensuring their safety during high-altitude operations. Two safety net suspension ropes are provided, each passing through the worker's left and right sides. The safety net is connected to the bottom of both safety net suspension ropes, positioned below the worker's body. This adds a second layer of safety protection and controls the position of the lower safety net, ensuring the worker remains centered within it, effectively preventing falls.
[0018] II. This invention utilizes safety net suspension ropes that pass through locking rings on the left and right sides of the waist and hip straps, with two support ropes and one suspension rope extending downwards. The ends of the suspension ropes are fixed to lifting hooks at the top of the central support frame. The central support frame is supported by foldable and retractable protective net support rods symmetrically arranged on both the front and rear sides. These support rods are always extended, effectively defining the safe protection area of the net. Simultaneously, the safety net suspension ropes, passing through the waist and hip straps, move with the workers at height, facilitating high-altitude operations from any position within the grain silo and effectively improving safety. It does not occupy significant space beneath the silo and does not obstruct ground access.
[0019] Third, by fixing the ends of the ropes on the two support poles to the hooks on the safety net on both sides, if a worker accidentally slips from a height, their weight will cause them to fall into the center of the safety net. The ropes on the two support poles will then pull the worker towards the center, ensuring a safe fall into the middle of the net. As the worker falls towards the center, the central area of the net sinks, and the weight of the support poles on both sides pushes the movable blocks downwards, breaking the safety wires. The support poles then retract towards the center, catching the worker in their abdomen and effectively preventing a further fall. This improves safety.
[0020] Fourth, the fuse ensures that the safety net support rod is always in the extended state, effectively protecting the safety protection area of the safety net. It also disconnects quickly if a worker falls onto the safety net, achieving the technical effect of the safety net's edges closing towards the center. Furthermore, it is sensitive to the protection of moving workers, effectively ensuring the safety of workers from falling again. Attached Figure Description
[0021] The accompanying drawings are merely simplified or schematic diagrams illustrating structural features and do not represent the actual structural features, dimensions, or tolerances. They are intended only to facilitate understanding of the technical solutions of this application by those skilled in the art. The invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0022] Figure 1 This is a complete structural schematic diagram of the mobile safety protection device for high-altitude operations according to the present invention.
[0023] Figure 2 This is a partial cross-sectional structural diagram of the bottom of the central support of the present invention;
[0024] Figure 3 This is a partial left-side view of the central support, movable block, and sliding slot of the present invention.
[0025] Figure 4 This is a top view of the protective netting structure of the present invention below the workers;
[0026] Figure 5This is a front view schematic diagram of the fixed support rod, central support, protective net support rod, and protective net of the present invention.
[0027] In the diagram: 1. First safety rope; 2. Safety net suspension rope; 3. Chest and shoulder straps; 4. Waist and hip straps; 5. Lifting hook; 6. Protective net; 7. Protective net hook; 8. Protective net support rod; 9. Central support; 10. Hinge support; 11. Wire groove; 12. Movable block; 13. Sliding groove; 14. Fuse; 15. Wire loop; 16. Fixed support rod; 17. Support rod pull rope; 18. Fuse hole. Detailed Implementation
[0028] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below with reference to specific figures. It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of this application can be combined with each other.
[0029] Example 1
[0030] Please see Figure 1-5 This is a schematic diagram of the overall structure of a mobile safety protection device for high-altitude operations.
[0031] A mobile safety protection device for high-altitude operations includes a first safety rope 1 and a safety net suspension rope 2 fixed to a crane;
[0032] The system includes one first safety rope 1, with workers suspended below it; two safety net ropes 2 are provided, each passing through the left and right sides of the worker's body for securing the ropes. A protective net 6 is connected to the bottom of the two safety net ropes 2, and the protective net 6 is located below the worker's body.
[0033] The bottom end of the first safety rope 1 is fixedly connected to a chest and shoulder strap 3 and a waist and hip strap 4. The chest and shoulder strap 3 and the waist and hip strap 4 are respectively tied to the corresponding body parts of the worker to improve the worker's safety protection.
[0034] Specifically, in this embodiment, the first safety rope 1 and the safety net suspension rope 2, fixed to the crane, are independently suspended. During lifting, the protective net 6 does not pull or compress the worker's body. One first safety rope 1 is provided for suspending the worker, ensuring their safety during high-altitude operations. Two safety net suspension ropes 2 are provided, each passing through the worker's left and right sides. The protective net 6 is connected below the two safety net suspension ropes 2, positioned below the worker's body. This adds a second layer of safety protection and controls the position of the lower protective net 6, ensuring the worker is always positioned in the center of the lower protective net 6, effectively preventing falls.
[0035] The waist and hip strap 4 has locking rings on both sides for the safety net hanging rope 2 to pass through. Each safety net hanging rope 2 passes through the locking rings on the left and right sides of the waist and hip strap 4 and has two support ropes 17 and a hanging rope downwards to facilitate the fixing of the protective net 6.
[0036] The protective net 6 includes a central support 9 fixed below the safety net suspension rope 2. A lifting hook 5 is fixed to the top of the central support 9, and the lifting hook 5 is fixed to the end of the suspension rope passing below the locking ring. Foldable and retractable protective net support rods 8 are symmetrically arranged on the front and rear sides of the central support 9. A protective net hook 7 is set at the top of the protective net support rod 8. The ends of the two support rod pull ropes 17 passing below the locking ring are respectively fixed to the protective net hooks 7 on the two protective net support rods 8.
[0037] The protective net 6 is laid flat on several protective net hooks 7 supported by the central support 9 and the protective net support rods 8. The protective net 6 is a diamond-shaped net made of nylon, and the net structure is relatively light.
[0038] A lifting and sliding hinge support 10 is provided at the bottom of the front and rear sides of the central support 9. The bottom ends of the protective net support rods 8 on the front and rear sides of the central support 9 are hinged to the corresponding hinge support 10.
[0039] The central support 9 includes a sliding groove 13 at its bottom. A movable block 12 is slidably connected within the sliding groove 13. Hinges 10 on both sides are fixed to the two ends of the movable block 12. A through fuse hole 18 is provided in the middle of the sliding groove 13. A fuse 14, which is a easily broken iron wire or nylon wire, is inserted into the fuse hole 18. The fuse 14 is intercepted below the movable block 12 within the sliding groove 13. Both ends of the fuse 14 extend through the fuse hole 18 to the left and right sides of the central support 9. Wire loops 15 are provided on each of the left and right sides of the central support 9. The ends of the fuse 14 extending to the left and right sides of the central support 9 are wrapped around the corresponding wire loops 15.
[0040] Specifically, in this embodiment, the fuse 14 ensures that the protective net support rod 8 is in the normally extended state, which can effectively protect the safe protection area of the protective net 6, and quickly disconnects when a worker falls onto the protective net 6, achieving the technical effect of the protective net 6's edges closing towards the center. It also provides sensitive protection for moving workers, effectively ensuring the safety of workers from falling again.
[0041] A wire slot 11 is provided in the middle of the bottom surface of the movable block 12. The wire slot 11 is inserted into the fuse 14 in the sliding slot 13. The hinge supports 10 on both sides of the movable block 12 are stabilized in the center position by the wire slot 11.
[0042] The bottom of the two central supports 9 is equipped with a fixing strut 16 to fix the relative position of the two central supports 9. The fixing strut 16 is fixed to the two central supports 9 by welding.
[0043] Specifically, in this embodiment, each safety net suspension rope 2 passes through the locking rings on the left and right sides of the waist and hip strap 4 and is branched downwards by two support rod ropes 17 and one suspension rope. The ends of the suspension ropes are fixed to the lifting hooks 5 at the top of the central support 9. The central support 9 supports the protective net 6 through foldable and retractable protective net support rods 8 symmetrically arranged on the front and rear sides. The protective net support rods 8 are in the normally extended state, which can effectively protect the safety protection area of the protective net 6. At the same time, the safety net suspension rope 2 passes through the waist and hip strap 4 and moves with the workers at high altitude, which is conducive to the workers to carry out high-altitude operations at any position in the grain silo, effectively improving the safety of protection. It does not occupy a lot of space under the silo and does not affect the passage of ground operations.
[0044] Specifically, in this embodiment, the ends of the two support rod ropes 17 are fixed to the safety hooks 7 on the two side support rods 8. When a worker accidentally slips from a height, their weight will cause them to fall into the center of the safety net 6. The two support rod ropes 17 will pull them towards the center, allowing the worker to safely fall into the middle of the safety net 6. As the worker falls towards the center of the safety net 6, the central area of the safety net 6 sinks, and the two side support rods 8, supported by gravity, push the movable block 12 downwards to break the fuse 14. The support rods 8 then retract towards the center, scooping the worker up and effectively preventing them from falling again. This improves safety.
[0045] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.
Claims
1. A mobile safety protection device for high-altitude operations, characterized in that, This includes the first safety rope and the safety net suspension rope, which are fixed to the crane. The system includes one first safety rope, with a worker suspended below it; and two safety net ropes, which pass through the worker's left and right sides respectively. A protective net is connected to the bottom of the two safety net ropes, and the protective net is located below the worker's body.
2. The mobile safety protection device for high-altitude operations according to claim 1, characterized in that: The bottom end of the first safety rope is fixedly connected to a chest and shoulder strap and a waist and hip strap, which are respectively tied to the corresponding body parts of the worker.
3. The mobile safety protection device for high-altitude operations according to claim 1, characterized in that: The waist and hip straps are provided with locking rings on both the left and right sides for the safety net suspension ropes to pass through. Each safety net suspension rope passes through the locking rings on the left and right sides of the waist and hip straps and is provided with two support ropes and one suspension rope downwards.
4. The mobile safety protection device for high-altitude operations according to claim 3, characterized in that: The protective net includes a central support fixed below the safety net suspension rope. A lifting hook is fixed to the top of the central support, and the lifting hook is fixed to the end of the suspension rope passing below the locking ring. Foldable and retractable protective net support rods are symmetrically arranged on the front and rear sides of the central support. A protective net hook is set at the top of the protective net support rod. The ends of the two support rod pull ropes passing below the locking ring are respectively fixed to the protective net hooks on the two protective net support rods.
5. A mobile safety protection device for high-altitude operations according to claim 4, characterized in that: The protective netting is laid flat on several netting hooks supported by a central support and netting struts. The protective netting is a diamond-shaped mesh made of nylon.
6. A mobile safety protection device for high-altitude operations according to claim 5, characterized in that: The central support is provided with a lifting and sliding hinge support at the bottom of the front and rear sides, and the bottom ends of the protective net support rods on the front and rear sides of the central support are hinged to the corresponding hinge supports.
7. A mobile safety protection device for high-altitude operations according to claim 6, characterized in that: The central support includes a sliding slot at the bottom of the central support, a movable block that is slidably connected in the sliding slot, and hinge supports on both sides that are fixed to the two ends of the movable block. A through fuse hole is provided in the middle of the sliding slot, and a fuse is inserted into the fuse hole. The fuse is intercepted below the movable block in the sliding slot, and both ends of the fuse extend to the left and right sides of the central support through the fuse hole. Wire lugs are provided on the left and right sides of the central support, and the two ends of the fuse extending to the left and right sides of the central support are wrapped around the corresponding wire lugs.
8. A mobile safety protection device for high-altitude operations according to claim 7, characterized in that: A wire slot is provided at the middle of the bottom surface of the movable block, and the wire slot is engaged with the fuse in the sliding slot.
9. A mobile safety protection device for high-altitude operations according to claim 8, characterized in that: The bottom of the two central supports is provided with a fixed support rod to fix the relative position of the two central supports.