Anti-falling system for aircraft ground maintenance

Abstract

The utility model discloses an anti-falling system for aircraft ground maintenance. The anti-falling system comprises an anti-falling device, a connecting air pipe, a vacuum generator and a safety rope, the falling protector comprises a vacuum suction cup, a set top box, a rotating piece and a lifting appliance. The bottoms of the two vacuum chucks form an adsorption cavity; the two set top boxes are respectively connected to the top surfaces of the two vacuum chucks; a gas path interface is arranged on the side wall of the set top box; the rotating piece realizes rotating connection of the two vacuum chucks; the lifting appliance is fixed on the outer wall of the rotating part shaft; the connecting air pipe is communicated with two adjacent adsorption cavities; an air supply port of the vacuum generator is communicated with the air path interface on the outermost falling protector; and the safety rope realizes the connection of a plurality of falling protectors. The anti-falling system provided by the utility model ensures that civil aviation employees are always in safety protection in the operation and movement processes, expands the movement range of the operators, can move flexibly, and can give an alarm according to the movement of the operators and the degree of vacuum pressure in the suction cup to prevent falling safety accidents in advance.

Description

Technical Field

[0001] The utility model relates to the technical field of aircraft maintenance anti - fall devices, and more specifically, to an anti - fall system for aircraft ground maintenance. Background Art

[0002] During the process of working at heights, the risk of falling is a concern for countless safety managers. Currently, working at heights is common in various construction projects, and there are problems such as variable and complex working environments and ineffective protection coverage.

[0003] In recent years, with the rapid development of China's economy and the continuous increase in population, the civil aviation industry has witnessed rapid development, and large regional and trunk civil aviation airliners have gradually been introduced into major airlines. Aircraft ground operations are complex and important. Especially when the aircraft is at a high altitude and has a smooth surface during ground maintenance, and the aircraft body is affected by adverse weather such as rain, snow, and strong winds, the wet and icy surface of the aircraft body is more dangerous for maintenance, and falling accidents occur from time to time.

[0004] The current status of the working environment at heights often appears in civil aviation ground maintenance and other constructions. Maintenance workers often encounter the situation where there is a lack of safety for edge - height operations because anti - fall devices available on the market cannot be installed on the aircraft body surface. Working at the edge in such a situation poses a significant safety hazard. To reduce the risk of workers working at heights, corresponding measures have been taken. For example, warning signs are set up in places prone to high - altitude falls, anti - fall devices are equipped for workers at heights, and safety training is provided for workers at heights. However, despite the preventive measures taken by enterprises for anti - fall at heights, there are still high - altitude falling accidents among workers wearing anti - fall devices.

[0005] Currently, there are some defects in the high - altitude anti - fall devices for civil aviation aircraft maintenance operations, such as the anti - fall arresters cannot be hung high and used low, have poor braking effects, are lagging in response, and have false locking. They have certain limitations when used in different environments. Quite a number of safety accidents occur when maintenance operations are carried out on the aircraft fuselage, horizontal tail, vertical tail, and large wings, etc. Currently, there is no special device on the market to protect the personal safety of operators.

[0006] Therefore, how to provide an anti - fall system for aircraft ground maintenance to solve the problems of the lack of safety belts, safety protection equipment, and reliable hanging points for high - altitude operations in existing aircraft ground maintenance construction is an urgent problem for those skilled in the art. Summary of the Utility Model

[0007] In view of this, the present utility model provides a fall prevention system for aircraft ground maintenance, which uses vacuum suction cups to adsorb on the surfaces of aircraft wings, horizontal tails, fuselages, and noses, providing safety protection for workers on these parts of the aircraft and preventing the workers from falling.

[0008] To achieve the above object, the present utility model adopts the following technical solutions:

[0009] A fall prevention system for aircraft ground maintenance, comprising:

[0010] Fall arresters, the number of the fall arresters is multiple, and each fall arrester includes a vacuum suction cup, a set-top box, a rotating member, and a sling; the two vacuum suction cups are symmetrically arranged, and an adsorption cavity is formed at the bottom of the vacuum suction cup; the two set-top boxes are respectively detachably connected to the top surfaces of the two vacuum suction cups in one-to-one correspondence; air path interfaces are fixed on the opposite two side walls of the set-top box, and the air path interfaces are communicated with the adsorption cavity; the rotating member is fixed on the end surfaces of the corresponding two set-top boxes close to each other to realize the rotational connection of the two vacuum suction cups; the sling is fixed on the outer wall of the shaft of the rotating member;

[0011] Connecting air pipes, the two ends of the connecting air pipes are respectively communicated with the opposite air path interfaces of adjacent two fall arresters to communicate the adsorption cavities of adjacent two fall arresters;

[0012] A vacuum generator, the air supply port of the vacuum generator is communicated with the air path interface on the outermost fall arrester through the connecting air pipe;

[0013] A safety rope, one end of the safety rope sequentially passes through the anchor points on multiple slings to realize the connection of multiple fall arresters.

[0014] The beneficial effects of the above technical solutions are that multiple fall arresters can be arranged on the outer surfaces of aircraft wings, horizontal tails, fuselages, and noses. The vacuum suction cups adsorb on the surface of the aircraft. The adsorption cavities of adjacent two vacuum suction cups are communicated by using connecting air pipes. The air path interface of the first group of fall arresters is communicated with the air supply port of the vacuum generator through the connecting air pipe. After the vacuum generator is started, it can perform vacuum pumping operations on the vacuum suction cups of multiple groups of fall arresters, and the vacuum suction cups can firmly adsorb on the surface of the aircraft; the safety rope passes through the slings to connect multiple fall arresters into a whole. When the operator performs maintenance operations on the surface of the aircraft, the safety belt can be suspended on the safety rope, effectively ensuring the safety of aircraft maintenance operations and preventing the occurrence of high-altitude falling accidents.

[0015] Preferably, shuttles are slidably connected to the safety rope between adjacent two fall arresters. The shuttles can slide on the safety rope, which can increase the maintenance radius of the operator and meet the operation requirements of the operator for circuit breakers and disconnectors while moving.

[0016] Preferably, a valve core is fixed inside the air path interface to control the opening and closing of the air path interface. By means of the valve core, the air path interface is a self-sealing interface. When the air path interface is connected to an air pipe, the connector of the air pipe touches the valve core, and the air path interface is connected to the air pipe for vacuum pumping operation; when the air path interface is not in use, the valve core is closed and the air path interface is in a sealed state.

[0017] Preferably, the vacuum suction cup includes a cover plate and an adsorption sheet; the adsorption sheet surrounds the peripheral side of the cover plate and extends downward along the bottom surface of the cover plate, and an adsorption cavity is formed between the inner wall of the adsorption sheet and the bottom wall of the cover plate; a pipeline is fixed inside the inner cavity of the set-top box, and its two ends are respectively communicated with the air path interface and the adsorption cavity.

[0018] Preferably, the rotating member includes an ear plate and a rotating shaft;

[0019] One ends of the two ear plates are respectively vertically fixed on the mutually adjacent end faces of the corresponding two set-top boxes, and through holes are formed in the vertical plate surfaces of the ear plates; the plate surfaces of the ear plates on the corresponding two set-top boxes are mutually abutted;

[0020] Two ends of the rotating shaft are respectively rotatably connected to the hinge holes of the ear plates on the corresponding two set-top boxes.

[0021] The beneficial effects of the above technical solution are that the two vacuum suction cups can be rotatably connected through the rotating shaft. When not in use, the bottom surfaces of the two vacuum suction cups can be folded in half, reducing the volume of the fall arrester and facilitating transportation and storage; when in use, the vacuum suction cups can be placed at positions such as the fuselage, horizontal tail, vertical tail and large wing of the aircraft. By rotating the rotating shaft, the angles of the two vacuum suction cups can be adjusted to ensure that the vacuum suction cups are closely attached to the surface of the aircraft fuselage. After the vacuum generator is started, vacuum is sucked through the connecting air pipe, so that a negative pressure is formed in the adsorption cavity, and the vacuum suction cups are firmly adsorbed on the surface of the aircraft. The maintenance personnel hang the safety belt on the sling for maintenance operations, effectively ensuring the safety of the maintenance personnel and preventing the occurrence of falling accidents.

[0022] Preferably, the sling includes a connecting column and a lifting lug. One end of the connecting column is perpendicular to the outer wall of the rotating shaft and is fixedly connected thereto, and the lifting lug is fastened to the other end of the connecting column by screws; one end of the safety rope sequentially passes through the suspension hole of the lifting lug and is tied and fixed. After the position of the fall arrester is fixed, the safety ropes connect multiple fall arresters in sequence by tying knots or winding. The safety belt worn by the operator can be suspended on the safety rope through a shuttle, and the operator can be effectively protected when moving on the surface of the aircraft.

[0023] Preferably, a battery is fixed inside the set-top box. On one side wall of the set-top box perpendicular to the rotating shaft, an air release valve and an alarm are fixed. The air release valve is connected to the adsorption chamber through a pipeline for relieving the pressure of the vacuum suction cup. The alarm is electrically connected to the battery. After the maintenance operation is completed, opening the air release valve can make the air pressure in the adsorption chamber become zero or positive pressure, releasing the adsorption effect between the vacuum suction cup and the aircraft surface. After the fall arrester is activated, the alarm starts to flash or emit an alarm sound, indicating that the device alarm system is working properly (if the alarm does not flash or there is no alarm sound, it indicates that there is a fault in the device alarm system and the operation needs to be stopped for alarm system maintenance).

[0024] Preferably, a power switch, a battery power display screen, and a digital display pressure switch are fixed on one side wall of the set-top box away from the ear plate. The power switch and the battery power display screen are both electrically connected to the battery. The digital display pressure switch is connected in series with the battery, and the digital display pressure switch is communicatively connected to the alarm.

[0025] A charging socket is provided on the outer wall of the set-top box for connecting a charger to charge the battery.

[0026] The beneficial effects of the above technical solution are as follows: The power switch controls the opening and closing of the arrester. The battery power display screen can real-time display the remaining power of the battery. The charging interface connects the charger to charge the battery. The digital display pressure switch is an intelligent pressure switch that integrates air pressure measurement, display, and control. The digital display pressure switch can control the vacuum degree in the adsorption chamber through a preset value. When the air pressure value displayed by the digital display pressure switch reaches the vacuum degree required for the vacuum suction cup to adsorb, the operator can hang the safety belt hook on the lifting lug and start the maintenance work. The digital display pressure switch always displays the air pressure value in the adsorption chamber. The maintenance personnel can select a suitable preset air pressure value according to different maintenance parts of the aircraft to achieve the adsorption effect between the fall arrester and the aircraft surface. When the pressure value displayed by the digital display pressure switch is lower than the preset value, a signal is transmitted to the alarm, and the alarm flashes or gives a sound warning to remind the maintenance personnel to stop the operation and check the working state of the fall arrester.

[0027] Preferably, the top end of the adsorption sheet is fixedly connected to the periphery of the cover plate, and the bottom of the adsorption sheet inclines outward from the cover plate. When the vacuum suction cup evacuates, the adsorption sheet will be compressed outward, reducing the height of the vacuum suction cup and increasing the contact area between the vacuum suction cup and the aircraft surface, ensuring the adsorption effect between the fall arrester and the aircraft surface.

[0028] Preferably, the vacuum suction cup is made of 304 stainless steel, and the set-top box is made of 5052 aluminum alloy. During the use of the anti-falling device, it will be in an outdoor environment for a long time. Especially due to the particularity of the civil aviation maintenance location, the influence of corrosion should be fully considered. Therefore, the vacuum suction cup is made of 304 stainless steel, which can not only resist corrosion but also has a certain strength. At the same time, to reduce the weight of the anti-falling device, the set-top box is made of 5052 aluminum alloy, which has good processing performance and is not prone to brittle fracture.

[0029] As can be seen from the above technical solutions, compared with the prior art, the present utility model discloses an anti-falling system for aircraft ground maintenance, which has the following beneficial effects:

[0030] 1) The anti-falling system can adapt to the civil aviation ground maintenance scenario. This system can ensure that civil aviation practitioners are always in safety protection during operation and movement. At the same time, it expands the activity range of the operators and enables flexible movement. When the operator is working, the vacuum suction cup adsorbs on the surfaces of the aircraft wing, horizontal tail, fuselage, nose, etc., providing safety protection for the staff on the aircraft wing, horizontal tail, fuselage, nose and other parts, and can prevent the maintenance operators from falling without damaging the airframe structure.

[0031] 2) The material of the anti-falling system is light in weight and convenient to carry. The material selection of this device should focus on high strength, wear resistance and corrosion resistance to extend its service life. For the surface staff of civil aviation aircraft, since the anti-falling device needs to move up and down with the operator during work, the design of the anti-falling device should fully consider its portability on the basis of ensuring its safety, and ensure that the quality of the anti-falling device does not exceed 5 Kg.

[0032] 3) The anti-falling device is intelligent. By installing an alarm and a digital display pressure switch on the anti-falling device, it can give an alarm according to the movement of the operator and the vacuum pressure reading in the suction cup, and prevent the occurrence of falling safety accidents in advance. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to the provided drawings.

[0034] Figure 1 It is a schematic structural diagram of the anti-falling system provided by the present utility model;

[0035] Figure 2 It is a schematic structural diagram of the anti-falling device provided by the present utility model;

[0036] Figure 3 The top view of the anti-falling device provided by the present utility model.

[0037] Among them,

[0038] 10 - Anti-falling device;

[0039] 101 - Set-top box; 1011 - Pneumatic circuit interface;

[0040] 102 - Vacuum sucker; 1021 - Cover plate; 1022 - Adsorption sheet;

[0041] 103 - Rotating part; 1031 - Ear plate; 1032 - Rotating shaft;

[0042] 104 - Suspension device; 1041 - Connecting column; 1042 - Suspension ear;

[0043] 105 - Power switch; 106 - Digital display pressure switch; 107 - Battery level display screen; 108 - Alarm; 109 - Air release valve;

[0044] 20 - Safety rope; 30 - Slide shuttle; 40 - Connecting air pipe; 50 - Vacuum generator. Specific embodiments

[0045] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0046] Refer to the attached Figures 1 to 3 , the embodiments of the present utility model disclose and provide an anti-falling system for aircraft ground maintenance. By using the vacuum adsorption principle, the anti-falling device can adsorb on parts such as the fuselage, horizontal tail, vertical tail, and large wing of the aircraft. The adsorption cavities of multiple anti-falling devices are connected through a connecting air pipe. A steel wire rope is wound around the suspension ear of the suspension device and used as a safety rope. The two vacuum suckers on each anti-falling device can adapt to the curve of the aircraft surface through a rotating shaft, so that the anti-falling device can effectively fit and adsorb on the aircraft surface, ensuring the adsorption effect and the safety of the operating personnel. It includes:

[0047] The fall arrester 10, the number of the fall arresters 10 is multiple, and the fall arrester 10 includes a vacuum sucker 102, a set-top box 101, a rotating member 103 and a sling 104; two vacuum suckers 102 are symmetrically arranged, and an adsorption cavity is formed at the bottom of the vacuum sucker 102; two set-top boxes 101 are respectively detachably connected to the top surfaces of the two vacuum suckers 102 in one-to-one correspondence; air path interfaces 1011 are fixed on the opposite two side walls of the set-top box 101, and the air path interfaces 1011 are communicated with the adsorption cavity; the rotating member 103 is fixed on the end surfaces of the corresponding two set-top boxes 101 close to each other to realize the rotational connection of the two vacuum suckers 102; the sling 104 is fixed on the outer wall of the shaft of the rotating member 103;

[0048] The connecting air pipe 40, the two ends of the connecting air pipe 40 are respectively communicated with the opposite air path interfaces 1011 of the adjacent two fall arresters 10 to communicate the adsorption cavities of the adjacent two fall arresters 10;

[0049] The vacuum generator 50, the air supply port of the vacuum generator 50 is communicated with the air path interface 1011 on the outermost fall arrester 10 through the connecting air pipe 40;

[0050] The safety rope 20, one end of the safety rope 20 sequentially passes through the anchor points on the multiple slings 104 to realize the connection of the multiple fall arresters 10.

[0051] During use, multiple groups of fall arresters are placed on the aircraft fuselage, horizontal tail, vertical tail and large wing. The opposite air path interfaces between adjacent two fall arresters are communicated through the connecting air pipe. The outermost air path interface of the first group of fall arresters is communicated with the air supply port of the vacuum generator through the connecting air pipe. The safety rope passes through the sling to connect multiple fall arresters into a whole. Adjust the relative angle of the two vacuum suckers. After ensuring that the vacuum suckers are attached to the aircraft surface, turn on the vacuum generator. The vacuum generator starts to work. Since the adsorption cavities of multiple fall arresters are communicated through the connecting air pipe, a negative pressure environment can be formed in the adsorption cavities of the vacuum suckers of all the fall arresters after the vacuum generator works. At this time, the vacuum suckers can firmly adsorb on the aircraft surface. When the operator performs maintenance operations on the aircraft, the hook of the safety belt can be hung on the safety rope, and the aircraft can be maintained within the effective radius of the safety belt. After the fall prevention system is installed, the aircraft can be comprehensively maintained; using the fall arrester provided by the present utility model, the maintenance personnel can move freely while ensuring their own safety, meeting the operation requirements of the operator for the circuit breaker and disconnector.

[0052] In this embodiment, a sliding shuttle 30 is slidably connected to the safety rope 20 between adjacent two fall arresters 10. The hook of the safety belt can be hung on the sliding shuttle. When the operator moves, the sliding range of the safety belt is the distance between adjacent two fall arresters, thereby improving the effective operation radius of the operator and ensuring the comprehensive maintenance work of the aircraft.

[0053] In this embodiment, a valve core is fixed inside the gas path interface 1011 to control the opening and closing of the gas path interface 1011. The gas path interface is self-sealing. Only when the connecting air pipe is communicated with the gas path interface, the valve core of the gas path interface opens. When the gas path interface is not communicated with the connecting air pipe, it is always in a sealed state. Therefore, after the anti-falling system is installed, the last gas path interface of the last group can be in a closed state without setting a connecting air pipe, ensuring the airtightness of the entire anti-falling system.

[0054] To further optimize the above technical solution, the vacuum suction cup 102 includes a cover plate 1021 and a suction sheet 1022; the suction sheet 1022 surrounds the circumferential side of the cover plate 1021 and extends downward along the bottom surface of the cover plate 1021. An adsorption cavity is formed between the inner wall of the suction sheet 1022 and the bottom wall of the cover plate 1021. A pipeline is fixed inside the set-top box 101, and its two ends are respectively communicated with the gas path interface 1011 and the adsorption cavity.

[0055] To further optimize the above technical solution, to ensure that the two vacuum suction cups on a single anti-falling device can rotate relative to each other, and the anti-falling device can adapt to the arc surface of the aircraft surface during use to ensure the adsorption effect between the anti-falling device and the aircraft surface, the rotating member 103 includes an ear plate 1031 and a rotating shaft 1032;

[0056] One end of two ear plates 1031 is respectively vertically fixed on the mutually adjacent end surfaces of the corresponding two set-top boxes 101. Through holes are formed on the vertical plate surfaces of the ear plates 1031; the plate surfaces of the ear plates 1031 on the corresponding two set-top boxes 101 are in mutual contact;

[0057] Both ends of the rotating shaft 1032 are respectively rotatably connected to the hinge holes of the ear plates 1031 on the corresponding two set-top boxes 101.

[0058] To further optimize the above technical solution, to facilitate the hanging and fixing of the safety rope, the sling 104 includes a connecting column 1041 and a lifting lug 1042. One end of the connecting column 1041 is perpendicular to the outer wall of the rotating shaft 1032 and is fixedly connected thereto. The lifting lug 1042 is fastened to the other end of the connecting column 1041 by screws; one end of the safety rope 20 sequentially passes through the suspension hole of the lifting lug 1042 and is tied and fixed.

[0059] The safety rope passes through the hole on the lifting lug. Both ends of the safety rope are fastened to the lifting lugs of the first group and the last group of anti-falling devices through snap rings. The safety rope connects all the anti-falling devices into a whole. A sliding shuttle is slidably connected to a small section of the safety rope between adjacent two anti-falling devices. Maintenance personnel can hang the safety belt on the sliding shuttle for convenient movement.

[0060] In some other specific embodiments, the set-top box 10 is fastened to the top surface of the cover plate 1021 by rivets.

[0061] In this embodiment, a battery is fixed inside the set-top box 101. On one side wall of the set-top box 101 perpendicular to the rotating shaft 1032, an air release valve 109 and an alarm 108 are fixed. The air release valve 109 is connected to the adsorption chamber through a pipeline and is used for pressure relief of the vacuum suction cup 102; the alarm 108 is electrically connected to the battery.

[0062] After the operator completes the maintenance work on the aircraft, the air release valve is opened to relieve the pressure in the adsorption chamber. After the pressure relief is completed, the adsorption effect between the vacuum suction cup and the aircraft surface can be released, the connecting air pipe and the safety rope are removed, and the vacuum suction cup is rotated so that the bottom surfaces of the two vacuum suction cups face each other, completing the storage of the anti-falling device, and the anti-falling device can be moved, transferred and stored.

[0063] To further optimize the above technical solution, a power switch 105, a power display screen 107 and a digital display pressure switch 106 are fixed on one side wall of the set-top box 101 away from the ear plate 1031. Both the power switch 105 and the power display screen 107 are electrically connected to the battery. The digital display pressure switch 106 is connected in series with the battery, and the digital display pressure switch 106 is communicatively connected to the alarm 108;

[0064] A charging socket is provided on the outer wall of the set-top box 101 for connecting a charger to charge the battery.

[0065] In some other specific embodiments, the alarm 108 is a sound alarm or a sound and light alarm.

[0066] After the anti-falling system is started, the alarm starts to flash or emits an alarm sound, indicating that the device alarm system is working properly (if the alarm does not flash or there is no alarm sound, it indicates that there is a fault in the device alarm system and the operation needs to be stopped for alarm system maintenance); after the vacuum generator is turned on and the vacuum suction cup adsorbs on the aircraft surface, when the alarm stops flashing and the sound alarm no longer emits a sound, and the digital display pressure switch shows that the vacuum degree of the adsorption chamber reaches the operation requirement, the operator starts to perform the maintenance work on the aircraft.

[0067] During the use process, the operator should always pay attention to the situation of the alarm system. If the alarm light flashes or the sound alarm emits an alarm sound (the alarm sound is greater than 110 decibels) and the digital display pressure switch shows that the pressure value is less than the set value, check whether the connecting air pipe and the vacuum generator are working properly. After troubleshooting, perform vacuum pumping again until the alarm system stops alarming. When the vacuum degree reaches above the set value again, the operator can continue to work.

[0068] When the battery power display on the power display screen ≤ 50%, the battery needs to be charged. Insert one end of the charger into the charging port and the other end into a 220V socket. When the power display shows 100%, it indicates that the battery is fully charged. The fall arrester provided by this new type of experiment can only meet the usage requirements when the battery power is greater than 50%, ensuring the adsorption effect during the use of the fall arrester, guaranteeing the fall prevention effect of maintenance workers, and improving the safety factor of aircraft maintenance. After the battery is fully charged, the fall arrester can work continuously for at least 36 hours.

[0069] To further optimize the above technical solution and increase the contact area between the vacuum suction cup and the aircraft surface, the top end of the adsorption sheet 1022 is fixedly connected to the peripheral side of the cover plate 1021, and the bottom of the adsorption sheet 1022 is inclined outward from the cover plate 1021.

[0070] To further optimize the above technical solution, ensure the corrosion resistance and strength of the fall arrester, and at the same time reduce the weight of the fall arrester, the vacuum suction cup 102 is made of 304 stainless steel material, and the set-top box 101 is made of 5052 aluminum alloy.

[0071] The fall prevention system provided by this utility model has carried out an impact force test using a QLB6F type impact force collector, with a collection speed of 1920 times / s; a hydraulic forklift with a rated load capacity of 1.5t is used to apply a tensile load, and the load-bearing belt has a load-bearing capacity of 3t;

[0072] Test process:

[0073] Raise the forklift forks and gradually load. When the load reaches 208.4 kg, the load-bearing belt is tensioned. Continue to continuously apply a tensile force of 1.5t, and relative sliding occurs between the fall arrester and the load-bearing belt, and the metal structure of the fall arrester is not damaged;

[0074] Continue to continuously apply a tensile force of 1.5t 10 times. Each time between the load-bearing belt and the fall prevention system, automatic unloading is achieved through relative sliding, the load-bearing belt is not broken, and the fall arrester is not damaged;

[0075] Manually unload, and then reload. When the tensile force reaches 300 kg, the fall arrester still remains stable and no relative sliding occurs. Thus, it can be seen that after relative sliding occurs, the fall arrester still maintains a high load-bearing capacity. Calculating based on the weight of maintenance workers being 100 kg, a maximum impact force of 920 kg will be generated during a fall, and the duration of the impact force exceeding 300 kg is only 0.075 s. Both the magnitude and duration of the impact force are less than the test load. Therefore, the fall prevention effect of the fall arrester is safe and reliable.

[0076] After testing, in the anti-falling system provided by the utility model, the air consumption of the compressed air source is 46 L / min, the air source pressure is 0.6 - 0.8 MPa, and the maximum allowable working load is 14,700 kPa; the static load of a single group of suction cups is 34,300 kPa; the falling load of a single group of suction cups: when the falling height is 1.0 m, the falling impact load is 14,700 kPa; by realizing the pressure cycle, it can ensure that each vacuum suction cup of the anti-falling system is subjected to balanced pressure, thus ensuring the stability of the anti-falling device; the balance of forces can ensure that when an operator stands on the protection device, the pressure on the device is balanced, so as to ensure that the protection device will not tilt.

[0077] When installing the anti-falling system, the adsorption anchor point must be the metal surface of the integral structure, generally selected within the structural frame; the adsorption surface must be a fixed non-movable part; the suction cups shall not be adsorbed on the surfaces of non-structural parts such as the leading edge box of the wing and the wind spoiler. The adsorption anchor point shall not have oil stains, and the dust on the aircraft surface shall be wiped off with a dry cloth before adsorption.

[0078] In this specification, each embodiment is described in a progressive manner. The key point of each embodiment is to illustrate the differences from other embodiments. The same or similar parts among the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the description of the method part.

[0079] The above description of the disclosed embodiments enables those skilled in the art to implement or use the utility model. Various modifications to these embodiments will be obvious to those skilled in the art. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the utility model. Therefore, the utility model will not be limited to the embodiments shown herein, but will be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An anti-falling system for aircraft ground maintenance, characterized in that, Comprising: Fall arresters (10), the number of the fall arresters (10) being multiple, the fall arresters (10) including vacuum suction cups (102), set-top boxes (101), rotating members (103) and suspension gears (104); the two vacuum suction cups (102) are symmetrically arranged, and an adsorption cavity is formed at the bottom of the vacuum suction cups (102); the two set-top boxes (101) are respectively detachably connected to the top surfaces of the two vacuum suction cups (102) in one-to-one correspondence; air path interfaces (1011) are fixed on opposite side walls of the set-top box (101), and the air path interfaces (1011) communicate with the adsorption cavity; the rotating member (103) is fixed to an end surface where the two corresponding set-top boxes (101) are close to each other to realize the rotational connection of the two vacuum suction cups (102); the suspension gear (104) is fixed on the outer wall of the shaft of the rotating member (103); Connecting air pipes (40), both ends of the connecting air pipes (40) are respectively communicated with the air path interfaces (1011) of adjacent two fall arresters (10) to communicate the adsorption cavities of the adjacent two fall arresters (10); A vacuum generator (50), an air supply port of the vacuum generator (50) is communicated with the air path interface (1011) on the outermost fall arrester (10) through the connecting air pipe (40); A safety rope (20), one end of the safety rope (20) sequentially passes through the anchor points on the multiple suspension gears (104) to realize the connection of the multiple fall arresters (10).

2. The anti-falling system for aircraft ground maintenance according to claim 1, characterized in that, Sliding shuttles (30) are slidably connected to the safety rope (20) between adjacent two fall arresters (10).

3. The anti-falling system for aircraft ground maintenance according to claim 1, characterized in that, A valve core is fixed in the air path interface (1011) to control the opening and closing of the air path interface (1011).

4. The anti-falling system for aircraft ground maintenance according to claim 1, characterized in that, The vacuum suction cup (102) includes a cover plate (1021) and an adsorption sheet (1022); the adsorption sheet (1022) surrounds the periphery of the cover plate (1021) and extends downward along the bottom surface of the cover plate (1021), and the adsorption cavity is formed between the inner wall of the adsorption sheet (1022) and the bottom wall of the cover plate (1021); a pipeline is fixed in the inner cavity of the set-top box (101), and both ends thereof are respectively communicated with the air path interface (1011) and the adsorption cavity.

5. The anti-falling system for aircraft ground maintenance according to claim 1, characterized in that, The rotating member (103) includes ear plates (1031) and a rotating shaft (1032); One ends of the two ear plates (1031) are respectively vertically fixed to an end surface where the two corresponding set-top boxes (101) are close to each other, through holes are formed in the vertical plate surfaces of the ear plates (1031); the plate surfaces of the ear plates (1031) on the two corresponding set-top boxes (101) are in mutual contact; Both ends of the rotating shaft (1032) are respectively rotatably connected to the hinge holes of the ear plates (1031) on the two corresponding set-top boxes (101).

6. The anti-falling system for aircraft ground maintenance according to claim 5, characterized in that, The sling (104) includes a connecting column (1041) and a lifting lug (1042). One end of the connecting column (1041) is perpendicular to the outer wall of the rotating shaft (1032) and fixedly connected thereto. The lifting lug (1042) is fastened to the other end of the connecting column (1041) by screws. One end of the safety rope (20) sequentially passes through the suspension hole of the lifting lug (1042) and is tied and fixed.

7. The anti-falling system for aircraft ground maintenance according to claim 6, characterized in that, A battery is fixed inside the set-top box (101). An air release valve (109) and an alarm (108) are fixed on a side wall of the set-top box (101) perpendicular to the rotating shaft (1032). The air release valve (109) is connected to the adsorption cavity through a pipeline for pressure relief of the vacuum suction cup (102). The alarm (108) is electrically connected to the battery.

8. The anti-falling system for aircraft ground maintenance according to claim 7, characterized in that, A power switch (105), a power display screen (107), and a digital display pressure switch (106) are fixed on a side wall of the set-top box (101) away from the ear plate (1031). Both the power switch (105) and the power display screen (107) are electrically connected to the battery. The digital display pressure switch (106) is connected in series with the battery, and the digital display pressure switch (106) is communicatively connected to the alarm (108). A charging socket is provided on the outer wall of the set-top box (101) for connecting a charger to charge the battery.

9. The anti-falling system for aircraft ground maintenance according to claim 4, characterized in that, The top end of the adsorption sheet (1022) is fixedly connected to the periphery of the cover plate (1021), and the bottom of the adsorption sheet (1022) inclines outward from the cover plate (1021).

10. The anti-falling system for aircraft ground maintenance according to claim 1, characterized in that, The vacuum suction cup (102) is made of 304 stainless steel, and the set-top box (101) is made of 5052 aluminum alloy.

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