A safety line device and method of safety protection

Abstract

The application discloses a kind of safety rope devices and safety protection methods for job, to solve the problems of poor adaptability, insufficient protection in special environment and excessive impact force in the prior art.The device includes a full-body safety belt provided with back, chest and waist positioning hanging points, a buffer assembly connected to the safety belt, and a speed differential connected to the buffer assembly, and the speed differential is provided with an anti-ratchet double-disc brake system.The buffer assembly includes a tear strip that limits the impact force to below 6kN when falling.The connecting assembly includes a safety hook and a double-hook structure that cooperates with the positioning rope and the horizontal lifeline to achieve continuous hitching.Through the cooperation of multiple hanging points, tear buffering and locking mechanism, the safety and comfort of the operation are improved, and various working conditions are adapted.

Description

Technical Field

[0001] This invention relates to the field of personal safety protective equipment technology, specifically to a safety rope device and safety protection method for work. Background Technology

[0002] In high-altitude construction, power line maintenance, wind power operation and maintenance, and confined space rescue operations, fall arrest safety ropes are crucial equipment for ensuring the safety of workers. Existing fall arrest systems typically include a full-body harness, a connecting rope (or a buffer rope), and hooks.

[0003] However, existing technologies have the following drawbacks: First, existing safety belt designs are relatively simple, typically equipped with only a single back or chest attachment point, lacking a reasonable layout with multiple attachment points (such as back, chest, and waist), making it difficult to meet the needs of flexible switching and positioning for different working postures. At the same time, the lack of comfortable support structures such as lumbar support belts can easily cause lumbar fatigue during prolonged work, affecting work efficiency. Furthermore, in special working environments such as electrical work or welding, ordinary metal attachment points are prone to conductivity, and ordinary webbing is flammable, posing serious safety hazards.

[0004] Secondly, the existing buffer and limiting structures are poorly coordinated. Traditional buffer ropes often use simple elastic deformation, which cannot effectively control the fall distance and impact force during a fall, easily causing the impact force to exceed the human body's tolerance threshold (e.g., exceeding 6kN), resulting in secondary injuries. At the same time, ordinary differentials are easily affected by dirt and dust in harsh environments, leading to braking failure, and lack coordination with the buffer components, resulting in slow locking response and long braking distance.

[0005] Third, the connection safety during mobile operations is insufficient. When workers move anchor points, the use of a single hook can easily cause them to be momentarily dislodged from the protection; and the existing positioning ropes and rope grippers have complex structures and do not fit tightly with the waist belt, making it difficult to meet the needs of fall prevention, positioning, and flexible movement. Summary of the Invention

[0006] In view of the shortcomings of the prior art, the purpose of this invention is to provide a safety rope device and safety protection method for work, so as to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, a specific embodiment of the present invention provides a safety rope device for work, including a full-body safety belt, a cushioning assembly, a speed differential, and a connecting assembly; the full-body safety belt is provided with a back attachment point, a chest attachment point, and a waist positioning attachment point set on a lumbar support belt; the cushioning assembly is connected to the full-body safety belt, and the cushioning assembly includes a cushioning pouch and a tear strip housed within the cushioning pouch, the tear strip being used to absorb energy through tearing deformation when subjected to fall impact, and to limit the maximum impact force to below 6kN; one end of the speed differential is connected to the cushioning assembly, and the other end is used to connect to an anchor point, the speed differential including a sealed housing and an anti-ratchet double-disc braking system disposed within the sealed housing, the braking system being used to automatically lock when the rope accelerates abnormally; the connecting assembly includes at least one safety hook for connecting to the anchor point or scaffolding.

[0008] In addition, the safety rope device and safety protection method for work proposed in this application may also have the following additional technical features: In one embodiment of this application, the back attachment point is a forged D-ring on the back, the chest attachment point is a D-ring on the chest or a webbing loop on the chest, and the waist positioning attachment point is a positioning D-ring disposed on both sides of the waist support belt; the shoulder straps, chest straps and leg straps of the full-body safety belt are adjusted by quick-plug or through-hook buckles, and the shoulder straps and the leg straps are different colors.

[0009] In one embodiment of this application, the full-body safety belt is made of high-strength polyester webbing with a breaking strength greater than 15kN and a width of 45mm or 60mm; the back attachment point, chest attachment point, waist positioning attachment point and metal adjustment buckle are all covered with insulating sleeves; the webbing of the full-body safety belt is made of flame-retardant aramid material.

[0010] In one embodiment of this application, the connecting component is a double-hook structure, which is used to maintain at least one anchor point connection during mobile operations to achieve continuous tethering; the safety hook is at least one of a 60mm open alloy steel scaffold hook, an aluminum scaffold hook, a screw lock hook, or a steel ring hook.

[0011] In one embodiment of this application, the connecting assembly further includes a positioning rope connected to the waist positioning point, and the positioning rope is provided with a rope gripper for moving and positioning along the guide rail or rope.

[0012] In one embodiment of this application, the device further includes a horizontal lifeline, which is a parallel steel wire rope fixed by multiple hanging points, and the end of the horizontal lifeline is equipped with a buffer device; the speed differential is slidably connected to the steel wire rope of the horizontal lifeline through a double-line shuttle.

[0013] A safety protection method using the aforementioned safety rope device includes the following steps: Step S1: Put on the full-body safety harness and adjust the chest strap, shoulder straps, and leg straps; Step S2: Attach the connecting component to the anchor point or scaffolding; Step S3: Select the positioning mode, limit mode or anti-fall mode according to the working conditions, and adjust the working length of the speed differential. Step S4: When an abnormal fall occurs, the anti-ratching dual-disc braking system in the differential locks, and at the same time, the tear strip in the buffer assembly undergoes tearing deformation to absorb the impact force of the fall, limiting the impact force to below 6kN.

[0014] In one embodiment of this application, in step S3, when the working condition is mobile operation, the double hook structure of the connecting component alternately switches to keep at least one anchor point in a connected state at all times.

[0015] In one embodiment of this application, in step S3, the working condition includes at least one of construction work, power work, rescue work, or confined space work, and the corresponding safety rope component configuration is selected according to different working conditions.

[0016] In one embodiment of this application, when the working condition is an electric or welding operation, insulation protection is achieved by an insulating sleeve fitted on the hanging point and the metal adjusting buckle, or fire protection is achieved by using flame-retardant aramid webbing.

[0017] The advantages of this invention compared to existing technologies are: (1) Through the synergistic effect of tear strip deformation and anti-rat tooth dual disc braking system, the fall braking distance can be effectively shortened, the maximum impact force can be limited to below 6kN, and the impact damage to the human spine and internal organs can be significantly reduced.

[0018] (2) The layout of multiple hanging points on the back, chest and waist, as well as the design of the waist support belt and sponge pad, effectively disperse the force and relieve waist fatigue; the different colors of the shoulder and leg straps and the quick-release buckle design make it easy to wear and inspect, and improve the convenience of operation.

[0019] (3) Through the design of insulating sleeve and flame-retardant aramid material, the risks of leakage and fire in special working environments such as power and welding are effectively solved, and the application scope of the equipment is expanded.

[0020] (4) The combination of the double hook structure and the positioning rope grabber ensures that the operator is always in a protected state when moving between different anchor points, eliminating the risk of instantaneous loss of protection when switching single hooks; the double-line shuttle structure in the horizontal lifeline greatly improves the flexibility and safety in large-span mobile operations.

[0021] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention 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 only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a three-dimensional representation of a work safety rope device according to an embodiment of the present invention. Figure 1 ; Figure 2 This is a three-dimensional representation of a work safety rope device according to an embodiment of the present invention. Figure 2 ; Figure 3 This is a schematic diagram of the internal structure of a safety rope device for work in one embodiment of the present invention; Figure 4 This is a schematic diagram of the horizontal lifeline structure of a work safety rope device according to an embodiment of the present invention; Figure 5 This is a flowchart illustrating the workflow / method steps of a safety rope device for work in one embodiment of the present invention.

[0024] Explanation of reference numerals in the attached figures: 1. Full-body seat belt; 2. Cushioning assembly; 3. Differential device; 4. Connecting assembly; 5. Horizontal lifeline; 101. Back anchor point; 102. Chest anchor point; 103. Waist anchor point; 201. Tear belt. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] Example 1

[0027] like Figures 1 to 5As shown, this invention provides a safety rope device for work, including a full-body safety belt 1, a cushioning assembly 2, a differential speed device 3, and a connecting assembly 4. The full-body safety belt 1 has a back attachment point 101, a chest attachment point 102, and a waist positioning attachment point 103, wherein the waist positioning attachment point 103 is located on a lumbar support belt. The cushioning assembly 2 is connected to the full-body safety belt 1 and includes a cushioning pouch and a tear strip 201 housed within the cushioning pouch. The tear strip 201 is made of high-strength polyester fiber webbing folded and sewn together with a pre-set strength thread. The breaking strength of the thread is set to match a safety threshold of 6kN. Upon impact from a fall, when the impact force exceeds the pre-set threshold, the thread breaks, and the folded portion of the tear strip 201 gradually unfolds and undergoes irreversible tearing deformation. During this process, the kinetic energy generated by the fall is converted into tearing work, thereby limiting the maximum impact force transmitted to the human body to below 6kN to avoid exceeding the human body's tolerance limit and causing secondary injury. The cushioning pack is made of abrasion-resistant fabric, and the tear strip 201 is housed inside the cushioning pack. One end of the tear strip is fixedly connected to the full-body seat belt 1, and the other end is fixedly connected to the differential 3, thus forming a complete force transmission path.

[0028] One end of the differential assembly 3 is connected to the buffer assembly 2, and the other end is used to connect to the anchor point. The differential assembly 3 includes a sealed housing and an anti-ratchet dual-disc braking system disposed within the sealed housing. In this embodiment, the sealed housing is made of high-strength aluminum alloy or engineering plastic, and the anti-ratchet dual-disc braking system includes a brake disc, a ratchet, and a centrifugal trigger mechanism. During normal operation, the centrifugal trigger mechanism does not operate, and the rope can be pulled out freely; when the rope pull-out speed exceeds a predetermined threshold (e.g., 2 m / s), the centrifugal trigger mechanism drives the brake disc to engage and lock with the ratchet, thereby quickly braking and locking within a limited distance. The sealed housing can isolate dirt, dust, and other impurities from the internal braking mechanism, ensuring reliable operation of the braking system in harsh environments. The connecting assembly 4 includes at least one safety hook for connecting to the anchor point or scaffolding to fix the safety rope device to the working surface.

[0029] In a specific implementation plan, the working process and principle of the above-mentioned safety rope device are as follows: The worker wears a full-body safety harness 1, passes his legs through the leg straps and fastens them, adjusts the chest strap, shoulder straps and leg straps to a close-fitting, comfortable and secure state, and ensures that the back attachment point 101 is located between the two shoulders on the back. Then, the safety hook of the connecting component 4 is attached to a fixed anchor point or scaffold. During normal operation, the rope of the differential 3 extends and retracts freely with the movement of the worker, without affecting the working range. When the worker falls abnormally, the falling speed increases rapidly. After the anti-ratchet double-disc braking system in the differential 3 senses the abnormal acceleration of the rope, it immediately locks automatically through the internal ratchet mechanism. At the same time as locking, the impact force generated by the fall is transmitted to the buffer component 2. The tear strip 201 in the buffer bag breaks and deforms under stress, converting the impact energy into tearing work, thereby limiting the maximum impact force transmitted to the human body to below 6kN, effectively protecting the life safety of the worker.

[0030] Example 2

[0031] This embodiment is basically the same as embodiment 1 in structure and working principle. The difference is that the attachment point structure, adjustment connection method and special materials of the whole body safety belt 1 are further specified.

[0032] In this embodiment, the back attachment point 101 is a forged D-ring on the back, located at the intersection of the shoulder straps; the chest attachment point 102 is a D-ring or webbing loop on the chest, located on the front of the chest strap; and the waist positioning attachment point 103 is a positioning D-ring located on both sides of the lumbar support belt. The shoulder straps, chest strap, and leg straps of the full-body safety belt 1 are all adjusted via quick-release or through-hook buckles, and the shoulder straps and leg straps are different colors to facilitate quick identification of correct wearing and easy adjustment by the worker.

[0033] For special working environments, the full-body safety belt 1 can be made of high-strength polyester webbing with a breaking strength greater than 15kN and a width of 45mm or 60mm. When in environments with hazards of electric shock or sparks, such as electrical work or welding, one approach is to cover the back attachment point 101, chest attachment point 102, waist positioning attachment point 103, and metal adjustment buckle with insulating sleeves to achieve complete insulation. Furthermore, the insulating sleeves are made of elastic silicone or heat-shrinkable rubber, tightly wrapping and fitting the outer surface of the back attachment point 101, chest attachment point 102, waist positioning attachment point 103, and metal adjustment buckle to achieve complete electrical isolation and prevent electric shock hazards to workers in electrical environments. Another approach is to directly use flame-retardant aramid material for the webbing of the full-body safety belt 1, utilizing the inherent flame-retardant properties of aramid to provide fire protection. The above structures effectively address the hazards of electric shock and fire in special working environments, improving safety.

[0034] Example 3

[0035] This embodiment is basically the same as embodiment 1 in terms of structure and working principle, except that it further adds structural configurations related to mobile operations and confined space operations.

[0036] The connecting component 4 can be a double-hook structure. This double-hook structure maintains at least one anchor point connection during mobile operations. Continuous tethering is achieved by alternating between the two hooks, eliminating the risk of workers being momentarily disconnected from protection during anchor point transfers. In actual configurations, the safety hook can be at least one of the following: a 60mm open alloy steel scaffold hook, an aluminum scaffold hook, a screw lock hook, or a steel ring hook, to accommodate different anchor point types.

[0037] In addition, the connecting component 4 also includes a positioning rope connected to the waist positioning attachment point 103. The positioning rope is equipped with a rope gripper. When the operator moves along the guide rail or rope, the rope gripper moves with the human body and slides on the positioning rope to achieve position limitation, making it convenient for the operator to free up both hands to perform work within a specific range.

[0038] In addition, for long-span operations, the device also includes a horizontal lifeline 5, which is a parallel steel wire rope fixed by multiple anchor points, and a buffer device at the end of the horizontal lifeline 5. The speed differential 3 is slidably connected to the steel wire rope of the horizontal lifeline 5 via a double-line shuttle. Because the horizontal lifeline 5 adopts a double-wire rope structure with parallel vertical alignment, combined with the movement of the double-line shuttle, it not only allows workers to move freely and smoothly in the horizontal direction, but also the end buffer device can effectively absorb the shock force of vibration in long spans, improving the flexibility and safety of mobile operations.

[0039] The double-line shuttle has two parallel through holes inside, through which the two parallel steel wire ropes of the horizontal lifeline 5 pass respectively. A connecting ring is located at the bottom of the double-line shuttle, and the top hook of the differential speed device 3 is fixedly connected to this connecting ring. Therefore, when the operator moves horizontally, the double-line shuttle can smoothly roll along the two steel wire ropes, ensuring operational flexibility.

[0040] Example 4

[0041] This embodiment provides a safety protection method using the safety rope device for work according to any one of claims 1 to 6, comprising the following steps: Step S1: Put on the full-body safety harness 1 and adjust the chest strap, shoulder straps and leg straps to fit snugly against the body and allow for easy movement; Step S2: Attach the safety hook of the connecting component 4 to the anchor point or scaffolding; Step S3: Select the positioning mode, limit mode or anti-fall mode according to the working conditions, and adjust the working length of the speed differential 3. In step S4, when an abnormal fall occurs, the anti-racket double disc braking system in the differential speed device 3 automatically locks when the rope accelerates abnormally. At the same time, the tear strip 201 in the buffer assembly 2 undergoes tearing deformation to absorb the impact force of the fall, limiting the impact force to below 6kN and protecting personnel safety.

[0042] In step S3 above, when the work condition is mobile work, the operator alternately switches the double hook structure of the connecting component 4 to keep at least one anchor point in a connected state, ensuring continuous fall protection when moving between different levels of the scaffold; when the work condition is electrical or welding work, insulation protection is achieved by the insulating sleeves fitted on the hanging points and metal adjusting buckles, or fire protection is achieved by using flame-retardant aramid webbing, thereby eliminating safety hazards caused by leakage or sparks.

[0043] Furthermore, the aforementioned work conditions include at least one of the following: construction work, power work, rescue work, or confined space work. For different work conditions, operators can select different safety rope component configurations: for example, in construction work, standard polyester webbing and double-hook connection components 4 can be used; in power work, insulated attachment points and flame-retardant aramid webbing can be used; in rescue or confined space work, it can be used in conjunction with a horizontal lifeline 5, a positioning rope, and a rope grabber, thereby ensuring optimal protection in various harsh on-site environments.

[0044] The technical solutions described in the above-mentioned embodiments of this application reduce the instantaneous impact force during a fall and effectively prevent secondary injuries to personnel through the synergistic effect of the tear deformation of the tear strip 201 and the anti-racket dual-disc braking system inside the differential gear 3; the addition of insulating sleeves and flame-retardant aramid webbing improves safety protection capabilities in special working environments such as power or welding; the alternating switching of the double hook structure of the connecting component 4 avoids the safety hazards caused by the instantaneous detachment of the anchor point during mobile operations; and the combination of the horizontal lifeline 5 and the rope gripper configuration on the positioning rope effectively adapts to the needs of various working conditions such as construction, rescue, and confined spaces, comprehensively improving the safety level of workers.

[0045] Obviously, the above-described embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention also intends to include these modifications and variations.

Claims

1. A safety rope device for work, characterized in that, Includes a full-body seat belt (1), a cushioning assembly (2), a differential (3), and a connecting assembly (4); The full-body safety belt (1) is provided with a back attachment point (101), a chest attachment point (102), and a waist positioning attachment point (103) set on the waist support belt. The buffer assembly (2) is connected to the full-body safety harness (1). The buffer assembly (2) includes a buffer bag and a tear strip (201) housed in the buffer bag. The tear strip (201) is used to absorb energy through tearing deformation when subjected to a fall impact and limit the maximum impact force to below 6kN. One end of the speed differential (3) is connected to the buffer assembly (2), and the other end is used to connect to the anchor point. The speed differential (3) includes a sealed housing and an anti-ratchet double disc braking system provided in the sealed housing. The braking system is used to automatically lock when the rope accelerates abnormally. The connecting component (4) includes at least one safety hook for connecting to an anchor point or scaffolding.

2. The safety rope device for work according to claim 1, characterized in that, The back attachment point (101) is a forged D-ring on the back, the chest attachment point (102) is a D-ring on the chest or a webbing loop on the chest, and the waist positioning attachment point (103) is a positioning D-ring set on both sides of the waist support belt; the shoulder straps, chest straps and leg straps of the full-body safety belt (1) are adjusted by quick-plug or through-type buckles. Specifically, the quick-plug buckle includes a pin with a hole and a slot, and the pin is inserted into the slot to achieve quick fastening; the through-type buckle includes a metal ring buckle, and the webbing is inserted through the metal ring buckle and then folded in the opposite direction to achieve length adjustment, and the shoulder straps and the leg straps are different colors.

3. The safety rope device for work according to claim 1, characterized in that, The full-body safety belt (1) is made of high-strength polyester webbing with a breaking strength greater than 15kN and a width of 45mm or 60mm. The back attachment point (101), chest attachment point (102), waist positioning attachment point (103) and metal adjustment buckle are all covered with insulating sleeves. The webbing of the full-body safety belt (1) is made of flame-retardant aramid material.

4. A safety rope device for work according to claim 1, characterized in that, The connecting component (4) is a double hook structure, which is used to maintain at least one anchor point connection during mobile operations to achieve continuous tethering; the safety hook is at least one of a 60mm open alloy steel scaffold hook, an aluminum scaffold hook, a screw lock hook or a steel ring hook.

5. A safety rope device for work according to claim 1, characterized in that, The connecting component (4) also includes a positioning rope connected to the waist positioning attachment point (103), and the positioning rope is equipped with a rope gripper for moving and positioning along the guide rail or rope.

6. A safety rope device for work according to claim 1, characterized in that, The device also includes a horizontal lifeline (5), which is a parallel steel wire rope fixed by multiple hanging points, and the end of the horizontal lifeline (5) is equipped with a buffer device; the speed differential (3) is slidably connected to the steel wire rope of the horizontal lifeline (5) through a double-line shuttle.

7. A safety protection method using a work safety rope device as described in any one of claims 1 to 6, characterized in that, Includes the following steps: Step S1: Put on the full-body safety harness (1) and adjust the chest strap, shoulder straps and leg straps; Step S2, attach the connecting component (4) to the anchor point or scaffolding; Step S3: Select the positioning mode, limit mode or anti-fall mode according to the working conditions, and adjust the working length of the speed differential (3); Step S4: When an abnormal fall occurs, the anti-ratch dual-disc braking system in the differential (3) is locked, and at the same time, the tear strip (201) in the buffer assembly (2) undergoes tearing deformation to absorb the impact force of the fall and limit the impact force to below 6kN.

8. The safety protection method according to claim 7, characterized in that: In step S3, when the working condition is mobile operation, the double hook structure of the connecting component (4) is switched alternately to keep at least one anchor point in a connected state.

9. The safety protection method according to claim 7, characterized in that: In step S3, the working conditions include at least one of construction work, power work, rescue work, or confined space work, and the corresponding safety rope component configuration is selected according to different working conditions.

10. The security protection method according to claim 7, characterized in that: When the operating conditions are electrical or welding operations, insulation protection is achieved by using insulating sleeves fitted on the hanging points and metal adjustment buckles, or fire protection is achieved by using flame-retardant aramid webbing.

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