Multi-hazard high altitude fall prevention device

Abstract

The present invention provides a high-altitude anti-fall device with multiple danger sources, which relates to the technical field of safety ropes and solves the problem that the anti-fall device in the prior art will restrain the wearer when there are multiple danger sources, making it impossible for the person to quickly escape from the scene, which is prone to danger. The high-altitude anti-fall device with multiple danger sources includes a housing, a safety rope assembly, a rotating shaft assembly, a speed measuring system and a brake buffer system; wherein the safety rope assembly includes a rope body, the rotating shaft assembly includes a roller, a part of the rope body is wound around the roller, and the extension and contraction of the rope body can drive the roller to rotate; the speed measuring system includes an acceleration detector, a speed detector and a circuit breaker, the acceleration detector and the speed detector are both arranged on the roller and electrically connected to the circuit breaker, the gate of the circuit breaker is connected to the brake buffer system, and the rotation of the roller can be limited when the circuit breaker trips. The present invention is used to provide a high-altitude anti-fall device with multiple danger sources that facilitates high-altitude workers to escape from danger sources.

Description

Technical Field

[0001] The invention relates to the technical field of safety ropes, in particular to a high-altitude fall prevention device with multiple danger sources. Background Art

[0002] High-altitude work usually refers to work at a height where there is a possibility of falling from a height of 2m or more (including 2m) above the falling height reference plane. Fall prevention devices are essential protective equipment for workers working at heights. Common fall prevention devices in the prior art are high-altitude work safety belts and speed differential automatic controllers. When a fall occurs, the high-altitude work safety belt can ensure that the wearer is suspended within the rope length range and wait for rescue; when a fall occurs, the speed differential automatic controller speeds up the pulling out speed of the safety rope, and the control system inside the device automatically locks immediately, so that the safety rope does not fall more than 0.2m, and the impact force is less than 2942N.

[0003] The applicant has found that when there are other sudden sources of danger near the work site, such as high temperature, high pressure, toxic or harmful fluids or other situations that require escaping the scene, people will instinctively flee, but the height work safety belt is usually short and the escape distance is very limited, and the speed difference automatic controller is easy to trigger automatic locking when the escape speed of the person increases instantly, preventing the person from escaping; both of them make it impossible for people to quickly escape from the danger point when there are multiple sources of danger, which is easy to cause injury. Summary of the invention

[0004] The purpose of the present invention is to provide a high-altitude fall prevention device with multiple danger sources, so as to solve the technical problem that the fall prevention device in the prior art will restrain the wearer when there are multiple danger sources, resulting in the inability of the wearer to quickly escape from the scene, which is prone to danger. The many technical effects that can be produced by the preferred technical solution among the many technical solutions of the present invention are described in detail below.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] The multi-hazard source high-altitude fall prevention device provided by the present invention comprises a housing, a safety rope assembly, a rotating shaft assembly, a speed measuring system and a brake buffer system; wherein:

[0007] The safety rope assembly includes a rope body, and the rotating shaft assembly includes a roller. The roller is rotatably connected to the outer shell, and a partial section of the rope body is wrapped around the roller. The extension and contraction of the rope body can drive the roller to rotate; the brake buffer system includes a brake assembly and a trigger assembly. The brake end of the brake assembly is arranged in the vicinity of the rotating shaft assembly, and the power output end of the trigger assembly is connected to the brake assembly. The speed measurement system includes an acceleration detector, a speed detector and a circuit breaker. The acceleration detector and the speed detector are both arranged on the roller and electrically connected to the circuit breaker. The gate of the circuit breaker is connected to the power input end of the trigger assembly. When the circuit breaker trips, the brake assembly can be connected to the roller through the trigger assembly to limit the rotation of the roller.

[0008] In a preferred or optional embodiment, the brake assembly includes a hydraulic disc brake assembly, the rotating shaft assembly includes a brake disc, the brake disc is connected to the roller, the brake end of the hydraulic disc brake assembly is arranged in an area near the brake disc, and the brake handle of the hydraulic disc brake assembly is connected to the power output end of the trigger assembly.

[0009] In a preferred or optional embodiment, the brake disc is connected to the roller via a ratchet mechanism, and when the circuit breaker trips, the brake end of the hydraulic disc brake assembly can contact the brake disc to generate friction to limit the stretching of the rope body.

[0010] In a preferred or optional embodiment, the ratchet mechanism is an internally meshing ratchet.

[0011] In a preferred or optional embodiment, the trigger assembly includes a brake tensioner, a trigger, a first spring and a second spring, one end of the trigger is rotatably connected to the housing, and the other end is connected to the gate of the circuit breaker, the middle area of ​​the brake tensioner is rotatably connected to the housing, one end of the brake tensioner is connected to the trigger through the first spring, and the other end is connected to the housing through the second spring, and one end of the brake tensioner connected to the second spring is connected to the brake buffer system; the first spring and the second spring are both tension springs.

[0012] In a preferred or optional embodiment, a first limiting groove and a second limiting groove are provided on the trigger, and after the circuit breaker trips, one end of the brake tensioner connected to the first spring can slide from the first limiting groove to the second limiting groove.

[0013] In a preferred or optional embodiment, the brake buffer system also includes a stroke control component, which is connected to the housing and is arranged in an area near the brake tensioner and close to the second spring, and can abut against the stroke control component after the brake tensioner slides out of the first limit groove.

[0014] In a preferred or optional embodiment, the stroke control assembly includes a knob and a limit rod, the knob is rotatably connected to the housing and is provided with a worm gear, the limit rod is provided with a worm meshing with the worm gear, and can abut against the limit rod after the brake tensioner slides out of the first limit groove.

[0015] In a preferred or optional embodiment, the safety rope assembly also includes a retraction mechanism, which includes a winding column and a torsion spring, wherein both ends of the torsion spring are respectively connected to the outer shell and the winding column, the rope body is wound around the winding column, and the section of the rope body close to its free end is wound around the roller.

[0016] In a preferred or optional embodiment, a hook is fixedly connected to the free end of the rope.

[0017] The multi-hazard source high-altitude fall prevention device provided by the present invention comprises a shell, a safety rope assembly, a rotating shaft assembly, a speed measuring system and a brake buffer system. A rope body is wound around the roller of the rotating shaft assembly and can rotate with the extension and contraction of the rope body. The acceleration detector and the speed detector of the speed measuring system are both arranged on the rotating shaft assembly and electrically connected to the circuit breaker. The power input end of the trigger assembly is connected to the gate of the circuit breaker, and the power output end of the trigger assembly is connected to the brake assembly. When in use, the shell is fixed on a building. When a person working at a height falls, the rope body is pulled to drive the roller to rotate, and the acceleration detector The speed detector can measure the speed and acceleration of the roller. At this time, the speed and acceleration exceed the set values ​​at the same time, thereby triggering the circuit breaker to trip and connecting the brake assembly to the roller to hinder the rotation of the roller, so that the rope body stops slowly after being tightened to prevent people from falling; when a dangerous escape occurs, the rope body is pulled and the roller is driven to rotate at the same time. At this time, the acceleration detector and the speed detector can measure the speed and acceleration of the roller. Since the acceleration of a person when escaping will not continue, the speed and acceleration cannot exceed the set values ​​at the same time, thereby failing to trigger the circuit breaker to trip, and the brake assembly will not work, and will not restrain people from escaping from the danger source, thereby ensuring the safety of people. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 A schematic diagram of the structure of a high-altitude fall prevention device with multiple danger sources provided by the present invention;

[0020] Figure 2 for Figure 1 The trigger assembly is shown without the brake being actuated;

[0021] Figure 3 for Figure 2 The schematic diagram of the trigger assembly when the brake is activated is shown;

[0022] Figure 4 Schematic diagram of the ratchet mechanism.

[0023] In the figure, 1. shell; 2. safety rope assembly; 21. rope body; 211. hook; 22. retraction mechanism; 3. shaft assembly; 31. roller; 32. brake disc; 4. speed measuring system; 41. circuit breaker; 411. gate; 5. brake buffer system; 51. brake end; 52. trigger assembly; 521. brake tensioner; 522. trigger; 5221. first limit groove; 5222. second limit groove; 523. first spring; 524. second spring; 53. travel control assembly; 531. knob; 532. limit rod. DETAILED DESCRIPTION

[0024] To make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0025] The invention provides a multi-danger source high-altitude fall prevention device which facilitates high-altitude workers to escape from the dangerous sources.

[0026] Combine the following Figure 1 to Figure 4 The technical solution provided by the present invention is described in more detail.

[0027] like Figure 1 to Figure 4 As shown, the multi-hazard source high-altitude fall prevention device provided by the present invention includes a housing 1, a safety rope assembly 2, a rotating shaft assembly 3, a speed measuring system 4 and a brake buffer system 5; wherein,

[0028] The safety rope assembly 2 includes a rope body 21, and the rotating shaft assembly 3 includes a roller 31. The roller 31 is rotatably connected to the housing 1. Part of the rope body 21 is wrapped around the roller 31, and the extension and contraction of the rope body 21 can drive the roller 31 to rotate; the brake buffer system 5 includes a brake assembly and a trigger assembly 52. ​​The brake end 51 of the brake assembly is arranged in the vicinity of the rotating shaft assembly 3, and the power output end of the trigger assembly 52 is connected to the brake assembly. The speed measuring system 4 includes an acceleration detector, a speed detector and a circuit breaker 41. The acceleration detector and the speed detector are both arranged on the roller 31 and electrically connected to the circuit breaker 41. The gate of the circuit breaker 41 is connected to the power input end of the trigger assembly 52. ​​When the circuit breaker 41 trips, the brake assembly can be connected to the roller 31 through the trigger assembly 52 to limit the rotation of the roller 31.

[0029] The multi-hazard source high-altitude fall prevention device provided by the present invention comprises a shell 1, a safety rope assembly 2, a rotating shaft assembly 3, a speed measuring system 4 and a brake buffer system 5. The roller 31 of the rotating shaft assembly 3 is wound with a rope body 21 and can rotate with the extension and contraction of the rope body 21. The acceleration detector and the speed detector of the speed measuring system 4 are both arranged on the rotating shaft assembly 3 and are electrically connected to the circuit breaker 41. The power input end of the trigger assembly 52 is connected to the gate 411 of the circuit breaker 41, and the power output end of the trigger assembly 52 is connected to the brake assembly. When in use, the shell 1 is fixed on a building. When a person working at a height falls, the rope body 21 is pulled to drive the roller 31 to rotate. The acceleration detector The device and the speed detector can measure the speed and acceleration of the roller 31. At this time, the speed and acceleration exceed the set values ​​at the same time, thereby triggering the circuit breaker 41 to trip and connect the brake assembly to the roller 31, thereby preventing the roller 31 from rotating. As a result, the rope body 21 slows down after being tightened to prevent people from falling. When escaping in danger, the rope body 21 is pulled and the roller 31 is rotated at the same time. At this time, the acceleration detector and the speed detector can measure the speed and acceleration of the roller. Since the acceleration of a person during escape will not continue, the speed and acceleration cannot exceed the set values ​​at the same time, thereby failing to trigger the circuit breaker 41 to trip. The brake assembly does not work and will not prevent people from escaping from the danger source, thereby ensuring their safety.

[0030] As a preferred or optional embodiment, the brake assembly includes a hydraulic disc brake assembly, the shaft assembly 3 includes a brake disc 32, the brake disc 32 is connected to the roller 31, the brake end 51 of the hydraulic disc brake assembly is arranged in the vicinity of the brake disc 32, and the brake handle of the hydraulic disc brake assembly is connected to the power output end of the trigger assembly 52.

[0031] Specifically, the specific structure of the hydraulic disc brake assembly can refer to the structure of the hydraulic disc brake of a bicycle or motorcycle in the prior art. When a fall occurs, the trigger assembly 52 is actuated to press the brake handle of the hydraulic disc brake assembly, thereby increasing the oil pressure in the assembly so that the brake end 51 holds the brake disc 32 tightly, generating friction with the brake disc 32, limiting the rotation of the brake disc 32, thereby limiting the rotation of the roller 31 so that the rope body 21 cannot be elongated, thereby preventing a fall.

[0032] As a preferred or optional embodiment, the brake disc 32 and the roller 31 are connected via a ratchet mechanism, and when the circuit breaker 41 trips, the brake end 51 of the hydraulic disc brake assembly can contact the brake disc 32 to generate friction to limit the stretching of the rope body 21.

[0033] As a preferred or optional embodiment, the ratchet mechanism is an internal meshing ratchet.

[0034] Specifically, Figure 4 As shown, the brake disc 32 and the roller 31 are connected by a ratchet mechanism, which can prevent the rope body 21 from stretching in the braking state, but does not limit the retraction of the rope body 21.

[0035] As a preferred or optional embodiment, the trigger assembly 52 includes a brake tensioner 521, a trigger 522, a first spring 523 and a second spring 524, one end of the trigger 522 is rotatably connected to the housing 1, and the other end is connected to the gate 411 of the circuit breaker 41, the middle area of ​​the brake tensioner 521 is rotatably connected to the housing 1, one end of the brake tensioner 521 is connected to the trigger 522 through the first spring 523, and the other end is connected to the housing 1 through the second spring 524, and one end of the brake tensioner 521 connected to the second spring 524 is connected to the brake buffer system 5; the first spring 523 and the second spring 524 are both tension springs.

[0036] Specifically, Figure 2-3 As shown, after the circuit breaker 41 trips, the gate 411 pulls the trigger 522 to rotate, so that the tension of the first spring 523 and the second spring 524 pulls the brake tensioner 521 to rotate. Since the brake tensioner 521 is connected to the brake handle of the brake buffer system 5, the brake handle can be pushed to make the brake end 51 hold the brake disc 32 tightly to achieve the anti-fall effect; in addition, after the circuit breaker 41 is triggered to trip, it must be manually restored to prevent the brake end 51 from loosening when a fall occurs, causing the human body to fall again and be in danger.

[0037] As a preferred or optional embodiment, a first limiting groove 5221 and a second limiting groove 5222 are provided on the trigger 522. After the circuit breaker 41 trips, one end of the brake tensioner 521 connected to the first spring 523 can slide from the first limiting groove 5221 to the second limiting groove 5222.

[0038] Specifically, the first limit groove 5221 serves to fix the brake tensioner 521 before braking to prevent it from rotating to trigger the braking function and prevent people from escaping; the second limit groove 5222 is to prevent the brake tensioner 521 from rotating excessively and applying excessive force to the brake handle, thereby preventing a large impact force on a falling person.

[0039] As a preferred or optional embodiment, the brake buffer system 5 also includes a stroke control component 53, which is connected to the housing 1 and is arranged in an area near the brake tensioner 521 and near the second spring 524. After the brake tensioner 521 slides out of the first limit groove 5221, it can abut against the stroke control component 53.

[0040] As a preferred or optional embodiment, the travel control assembly 53 includes a knob 531 and a limit rod 532. The knob 531 is rotatably connected to the housing 1 and a worm gear is provided on the knob 531. The limit rod 532 is provided with a worm gear meshing with the worm gear, and can abut against the limit rod 532 after the brake tensioner 521 slides out of the first limit groove 5221.

[0041] Specifically, a partial section of the knob 531 is exposed outside the housing 1, and the operator can rotate the knob 531 to a specified position according to the weight of the wearer. Due to the cooperation of the worm gear, the limit rod 532 is also in a corresponding position. When the brake tensioner 521 rotates, it can abut against the limit rod 532, thereby providing different braking forces for wearers of different weights to prevent sudden braking from causing a large impact force on the human body.

[0042] As a preferred or optional embodiment, the safety rope assembly 2 also includes a retraction mechanism 22, which includes a winding column and a torsion spring, the two ends of which are respectively connected to the housing 1 and the winding column, the rope body 21 is wound around the winding column, and the section of the rope body 21 close to its free end is wound around the roller 31.

[0043] Specifically, the specific structure of the retraction mechanism 22 can refer to the retraction mechanism in the measuring tape, so that the rope body 21 is always in a semi-tensioned state during normal use or escape, and does not hinder the wearer from working or escaping.

[0044] As a preferred or optional embodiment, a hook 211 is fixedly connected to the free end of the rope body 21 for connecting with the wearer.

[0045] The multi-hazard source high-altitude anti-falling device provided by the present invention, once a human body slips and falls, the pulling speed and acceleration of the rope body 21 are accelerated, the parameters exceed the set value, the circuit breaker 41 is triggered to make the brake buffer system immediately decelerate and automatically lock, so that the rope body does not fall more than 0.3m during normal operation; when the escape speed is less than 8.8m / s, the falling distance does not exceed 2m, and when the maximum escape speed is 10m / s, the falling distance does not exceed 2.6m. When falling to 2m, it is equivalent to falling from a height of 1.2m, so as to ensure its safety to the human body as much as possible, and the brake locking controlled by the ratchet mechanism does not affect the retraction mechanism 22 to retract the rope body 21, so that even if the rope body 21 rebounds, it can be retracted in time to reduce the impact of the secondary fall, and the safety rope will be automatically recovered after the work is completed, which is convenient for carrying. After the load is released, the circuit breaker 41 and the brake buffer system 5 are manually reset, so that the multi-hazard source high-altitude anti-falling device can resume normal operation.

[0046] Unless otherwise stated, any technical solution disclosed in the present invention disclosed above, if it discloses a numerical range, then the disclosed numerical range is a preferred numerical range, and any technician in the field should understand that the preferred numerical range is only a numerical value with a more obvious technical effect or representative value among many implementable numerical values. Since there are too many numerical values ​​to be exhaustive, the present invention discloses some numerical values ​​to illustrate the technical solution of the present invention, and the numerical values ​​listed above should not constitute a limitation on the scope of protection of the present invention.

[0047] In the description of the present invention, unless otherwise specified, "plurality" means two or more than two; the orientations or positional relationships indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0048] At the same time, in the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0049] In addition, the terms used in any technical solution disclosed in the present invention to indicate positional relationships or shapes include states or shapes that are similar, similar or close to them unless otherwise stated. Any component provided by the present invention may be assembled from multiple separate components or may be a separate component manufactured by an integrated molding process.

[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the specific implementation methods of the present invention can still be modified or some technical features can be replaced by equivalents without departing from the spirit of the technical solution of the present invention, which should be included in the scope of the technical solution for protection of the present invention.

Claims

1. A multi-hazard source high-altitude fall prevention device, characterized in that: It includes a housing, a safety rope assembly, a rotating shaft assembly, a speed measuring system and a brake buffer system; wherein, The safety rope assembly includes a rope body, the rotating shaft assembly includes a roller, the roller is rotatably connected to the shell, a partial section of the rope body is wound around the roller, and the extension and contraction of the rope body can drive the roller to rotate; the brake buffer system includes a brake assembly and a trigger assembly, the brake end of the brake assembly is arranged in the vicinity of the rotating shaft assembly, the power output end of the trigger assembly is connected to the brake assembly, the speed measurement system includes an acceleration detector, a speed detector and a circuit breaker, the acceleration detector and the speed detector are both arranged on the roller and electrically connected to the circuit breaker, the gate of the circuit breaker is connected to the power input end of the trigger assembly, and when the circuit breaker trips, the brake assembly can be connected to the roller through the trigger assembly to limit the rotation of the roller; The brake assembly includes a hydraulic disc brake assembly, the rotating shaft assembly includes a brake disc, the brake disc is connected to the roller, the brake end of the hydraulic disc brake assembly is arranged in the vicinity of the brake disc, and the brake handle of the hydraulic disc brake assembly is connected to the power output end of the trigger assembly; The brake disc is connected to the roller via a ratchet mechanism, and when the circuit breaker trips, the brake end of the hydraulic disc brake assembly can contact the brake disc to generate friction to limit the stretching of the rope body; The ratchet mechanism is an internal meshing ratchet; The trigger assembly includes a brake tensioner, a trigger, a first spring and a second spring, one end of the trigger is rotatably connected to the housing, and the other end is connected to the gate of the circuit breaker, the middle area of ​​the brake tensioner is rotatably connected to the housing, one end of the brake tensioner is connected to the trigger through the first spring, and the other end is connected to the housing through the second spring, and one end of the brake tensioner connected to the second spring is connected to the brake handle; the first spring and the second spring are both tension springs; The trigger is provided with a first limiting groove and a second limiting groove, and after the circuit breaker is tripped, the end of the brake tensioner connected to the first spring can slide from the first limiting groove to the second limiting groove; The safety rope assembly also includes a retraction mechanism, which includes a winding column and a torsion spring. The two ends of the torsion spring are respectively connected to the housing and the winding column. The rope body is wound around the winding column, and the section of the rope body close to its free end is wound around the roller.

2. The multi-hazard source high-altitude fall prevention device according to claim 1 is characterized in that: The brake buffer system also includes a stroke control component, which is connected to the housing and is arranged in an area close to the brake tensioner and close to the second spring. After the brake tensioner slides out of the first limiting groove, it can abut against the stroke control component.

3. The multi-hazard source high-altitude fall prevention device according to claim 2 is characterized in that: The travel control assembly includes a knob and a limit rod. The knob is rotatably connected to the housing and is provided with a worm gear. The limit rod is provided with a worm meshing with the worm gear. After the brake tensioner slides out of the first limit groove, it can abut against the limit rod.

4. The multi-hazard source high-altitude fall prevention device according to claim 1 is characterized in that: A hook is fixedly connected to the free end of the rope body.

Images