A giant radio telescope reflector surface inspection and maintenance system

Abstract

The present invention relates to the technical field of giant radio telescope reflector surface maintenance, and in particular to a giant radio telescope reflector surface inspection and maintenance system, comprising: a plurality of microgravity spiders and a cableway construction mechanism. The present invention can meet the requirements of high efficiency, light weight and no damage to the reflector surface unit panel during the inspection and maintenance of the giant radio telescope reflector surface, and the operator can personally inspect the reflector surface unit panel, the reflector surface node disk, the reflector surface unit connection mechanism installed on the node disk, the target and other parts and other parts that need to be inspected from the upper surface of the reflector surface at close range, and carry necessary tools to perform necessary manual maintenance on these parts and parts, thereby realizing relatively reliable inspection and maintenance of the giant radio telescope reflector surface.

Description

Technical Field

[0001] The invention relates to the technical field of giant radio telescope reflecting surface maintenance, in particular to a giant radio telescope reflecting surface inspection and maintenance system. Background Art

[0002] The Five-hundred-meter Aperture Spherical radioTelescope (FAST) is a major scientific facility during my country's 11th Five-Year Plan. It is the world's largest and most sensitive single-aperture radio telescope in its observation frequency range. It has three independent innovative technologies. The entire telescope system includes the site excavation and base construction system, active reflector system, feed support system, measurement and control system, receiver and terminal system, etc.

[0003] The FAST active reflector system is a huge project, including equipment foundation, ring beam lattice column, cable net, actuator and reflector unit. Among them, the ring beam lattice column is the main load-bearing truss structure of the cable net; 2225 hydraulic actuators can drive the cable net to achieve active deformation through coordinated control, thereby driving the 4450 reflector unit panels connected to the cable net from spherical fitting to parabolic fitting, completing the real-time focusing function of the telescope on the radio wave signal of a specific direction. The cable net includes 6670 main cables, 2225 cable net node plates and 2225 pull-down cables, which are the key components for the reflector to achieve active deformation fitting. Each reflector unit has a side length of about 11 meters and weighs about 480 kilograms. It is an all-aluminum alloy structure. It is fixedly connected to the corresponding node plate through the connection mechanism at the three ends and can slide freely on the node plate, thereby avoiding the generation of additional internal forces inside the unit structure when the cable net is deformed.

[0004] 23 measurement piers belonging to the measurement and control system are built within the aperture of the reflector, and a measurement target is installed in the center of each cable net node disk. Two laser total stations are installed on each pier to measure the surface accuracy of the reflector, which is convenient for controlling the active deformation of the reflector. Each measurement pier exposes 1-5 meters of the reflector, and the operating platform on the top is about 2.7 meters in diameter. There is a 0.9-meter-high guardrail welded by steel pipes on the edge. The FAST active reflector system has a huge span, involving a large number of parts and components of various types. The cable net and the reflector unit are suspended in the air, with a vertical height of more than 4 meters from the ground, and even more than 50 meters at the edge. Such a large and complex mechanical structure system faces extremely severe challenges in the future operation and maintenance of the telescope. In particular, the 6,670 main cables and 2,225 node disks that constitute the cable net are subjected to reciprocating fatigue loading at high altitudes, and the 4,450 reflector units fixed to the cable net node disks through connecting mechanisms also slide back and forth on the node disks. The status of these key components needs to be inspected regularly to understand their structural health and mechanism lubrication status, and regular maintenance is required to avoid component failure. In addition, the measurement target in the center of each node disk has degraded laser reflection performance after long-term use and needs to be replaced regularly. Because the reflector unit is lightweight and cannot bear the weight of an adult, and the edge unit inclination angle reaches 60° when operating, inspection and maintenance workers cannot get close to the area where work is required (such as the cable net node disk) to work directly. Some existing equipment, such as various cranes and lifting robots, are constrained by the site terrain and the span of the reflector surface, and are either unusable or extremely inefficient, and cannot efficiently complete the "FAST reflector surface inspection and maintenance" task, which is both arduous and requires overcoming technical difficulties.

[0005] The information disclosed in this background technology section is only intended to deepen the understanding of the overall background technology of the present invention, and should not be regarded as acknowledging or suggesting in any form that the information constitutes the prior art already known to those skilled in the art. Summary of the invention

[0006] The purpose of the present invention is to provide a giant radio telescope reflecting surface inspection and maintenance system to solve the technical problems existing in the prior art.

[0007] In order to achieve the above object, the present invention adopts the following technical solutions:

[0008] The present invention provides a giant radio telescope reflecting surface inspection and maintenance system, which comprises: a plurality of microgravity spidermen and a cableway construction mechanism;

[0009] The microgravity spider-man comprises: a sphere, an inflation and deflation unit, a cable collection device and a hanging rigging; the sphere comprises: a main airbag, a secondary airbag, an anchoring rigging, a mooring rigging, an anchoring bowtie, a mooring bowtie, a collision protection belt and an observation window; the interior of the main airbag is filled with helium, the secondary airbag is arranged inside the main airbag, the interior of the secondary airbag is filled with air, 9 mooring bowties are arranged circumferentially at intervals on the lower outer side of the main airbag, the upper ends of the mooring rigging are respectively connected to the corresponding mooring bowties, and the lower ends of the mooring rigging are connected to the cable collection device; 6 Anchor bow, the upper ends of the anchor rigging are respectively connected to the corresponding anchor bow; the collision protection belt is arranged at the middle and lower parts of the main airbag; the observation window is arranged on the outer side of the main airbag; the inflation and deflation unit comprises: a main airbag helium inflation port and a secondary airbag inflation port, the main airbag helium inflation port is arranged at the middle and lower part of the main airbag, serving as an interface for the main airbag to inflate and deflate helium; the secondary airbag inflation port is arranged at the bottom of the main airbag, serving as an interface for the secondary airbag to inflate and deflate air; one end of the hanging rigging is connected to the cable collecting device, and a counterweight unit is arranged on the cable collecting device;

[0010] The cableway construction mechanism includes: a cable support column, a pulley platform, a first cableway, a second cableway and a third cableway, the cable support columns are respectively arranged at the inner and outer ring positions of the ring beam, the pulley platform is arranged on the track of the ring beam, a straight ladder is arranged between the pulley platform and the ring beam horseway, one end of the first cableway is connected to the cable support column of the outer ring of the ring beam, the other end of the first cableway is anchored to the concrete platform, the second cableway is built between the two cable support columns, one end of the third cableway is connected to the cable support column of the inner ring of the ring beam, and the other end of the third cableway is fixed to a measuring base pier in the reflecting surface, and the microgravity Spider-Man's hanging sling can be detachably connected to the first cableway, the second cableway and the third cableway respectively.

[0011] As a further technical solution, the giant radio telescope reflecting surface inspection and maintenance system also includes a three-way traction device; the three-way traction device includes: three traction ropes and three winches, the three winches are respectively fixed on three measuring piers, the three traction ropes are used to connect with the mooring rigging on the sphere, and the free ends thereof are respectively connected with the winches located on the three measuring piers, and the lengths of the three traction ropes are controlled by the winches to achieve auxiliary movement of the sphere or limit the movement of the sphere.

[0012] As a further technical solution, the giant radio telescope reflecting surface inspection and maintenance system also includes an inflation and exhaust device; the inflation and exhaust device includes: an inflation pipeline and an inflation and exhaust machine, the inflation pipeline includes a high-pressure hose, an adapter and a quick-release inflation tube connected in sequence; when helium is inflated during the erection process or helium is replenished during the operation process, one end of the high-pressure hose is connected to the helium container, and the quick-release inflation tube is connected to the helium filling port of the spherical airbag to carry out the corresponding inflation action; when the auxiliary airbag needs to be supplemented with air during the operation process, the quick-release inflation tube is removed separately and connected with the inflation and exhaust machine and the inflation port of the auxiliary airbag to realize the function of replenishing air to the auxiliary airbag; when withdrawn, the quick-release inflation tube is connected with the inflation and exhaust machine and the helium filling port of the main airbag to realize vacuuming of the main airbag.

[0013] As a further technical solution, the giant radio telescope reflecting surface inspection and maintenance system also includes ground anchoring equipment; the ground anchoring equipment includes: 6 ground anchors and a spherical base, the ground anchors are evenly distributed on a circular ground with a diameter of 11m, the spherical base is located directly below the sphere, and the upper part of the sphere that contacts the sphere is smooth and free of burrs.

[0014] As a further technical solution, the giant radio telescope reflecting surface inspection and maintenance system also includes a release and recovery device; the release and recovery equipment includes: a cableway pulley, a ground winch, a drone and a release and recovery protection rope; the cableway pulley is a tool for moving the sphere on the cableway, and the cableway pulley is provided with a hook, and the hook can be connected to the hanging rigging of the sphere; the ground winch is arranged around the erection point, and is used for storing, releasing and recovering the cableway and the release and recovery protection rope; the drone is a transportation equipment for the traction rope, and the traction rope is used to tow a third cableway or a traction rope; the release and recovery protection rope is connected to the mooring rigging through a quick release ring.

[0015] As a further technical solution, a safety unit is provided on the sphere, and the safety unit includes: an air valve and a pressure measuring assembly; the air valve is provided at the bottom of the auxiliary airbag, and the air valve has a self-sealing function when the pressure of the auxiliary airbag is below 700Pa, and when the pressure on both sides of the valve core of the air valve is greater than a preset threshold, the valve core automatically opens under the action of pressure to release part of the air inside the auxiliary airbag; the pressure measuring assembly is provided on the work clothes to monitor the pressure of the main airbag.

[0016] As a further technical solution, the cable gathering device includes: a cable gathering ring, a bearing seat, a thrust bearing, a swivel joint and a bearing seat end cover; the cable gathering ring is evenly distributed with 18 limit plates to provide a connection interface for the mooring rigging; the bearing seat is installed at the bottom center position of the cable gathering ring; the thrust bearing is arranged inside the bearing seat; the upper end of the swivel joint is installed in the thrust bearing; the lower end of the swivel joint is connected to the work clothes through a hanging rigging.

[0017] As a further technical solution, the counterweight unit includes: a release and recovery counterweight and a counterweight water tank, the release and recovery counterweight is a sandbag, and the counterweight water tank is a counterweight water tank.

[0018] As a further technical solution, the mooring rigging adopts brocade rope; the mooring rigging adopts a two-section structure, and the upper section and the lower section are connected by a quick-release ring; the upper end of the mooring rigging is connected to the mooring bow; the lower end of the mooring rigging is connected to the ground anchoring equipment.

[0019] As a further technical solution, the mooring slings are made of brocade ropes; the upper ends of the mooring slings are connected to the mooring bowknots, and the lower ends of the mooring slings are connected to the rope gathering device.

[0020] By adopting the above technical solution, the present invention has the following beneficial effects:

[0021] The invention provides a giant radio telescope reflecting surface inspection and maintenance system, which can meet the requirements of high efficiency and light weight during the inspection and maintenance of the giant radio telescope reflecting surface, and will not damage the reflecting surface unit panel. An operator can personally inspect the reflecting surface unit panel, the cable net node disk, the reflecting surface unit connection mechanism installed on the node disk, the measuring target and other parts and other parts that need to be inspected from the upper surface of the reflecting surface at close range, and carry necessary tools to perform necessary manual maintenance on these parts and parts, thereby realizing relatively reliable inspection and maintenance of the reflecting surface of the giant radio telescope. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 A schematic diagram of the structure of a giant radio telescope reflecting surface inspection and maintenance system provided by an embodiment of the present invention;

[0024] Figure 2 A schematic diagram of the structure of a cableway construction mechanism provided by an embodiment of the present invention;

[0025] Figure 3 A schematic plan view of a giant radio telescope reflecting surface inspection and maintenance system provided by an embodiment of the present invention;

[0026] Figure 4A schematic diagram of a fixed state of a microgravity Spider-Man device provided in an embodiment of the present invention;

[0027] Figure 5 A schematic diagram of the structure of a microgravity Spider-Man device provided in an embodiment of the present invention;

[0028] Figure 6 A schematic diagram of a connection method of cut panels of a main airbag provided in an embodiment of the present invention;

[0029] Figure 7 A schematic diagram of a connection method of cut pieces of a secondary airbag provided in an embodiment of the present invention;

[0030] Figure 8 A schematic diagram of a skirt connection method provided in an embodiment of the present invention;

[0031] Fig. 9 A schematic diagram of the structure of a bow tie provided in an embodiment of the present invention;

[0032] Fig.10 A schematic diagram of the structure of a transparent window provided by an embodiment of the present invention;

[0033] Fig.11 A schematic diagram of a foot bearing plate assembly provided by an embodiment of the present invention;

[0034] Fig.12 A schematic diagram of a leg bearing plate assembly provided by an embodiment of the present invention;

[0035] Fig.13 A schematic diagram of a forearm bearing plate assembly provided by an embodiment of the present invention;

[0036] Fig.14 A schematic diagram of a microgravity Spider-Man wearing forearm, leg and foot bearing plates provided in an embodiment of the present invention.

[0037] Icons: 1-sphere; 2-anchoring rigging; 3-mooring rigging; 4-counterweight unit; 5-cable collection device; 6-hanging rigging; 7-concrete floor of the small nest; 8-ground tripod; 9-main airbag; 10-auxiliary airbag; 11-collision protection belt; 12-work clothes; 13-heat sealing strip; 14-sealing strip; 15-cutting piece; 16-skirt; 17-bow tie; 18-observation window; 20-microgravity spiderman; 21-first cableway; 22- The second cableway; 23-the third cableway; 24-pulley platform; 25-measuring pier; 26-ring beam; 27-feed support tower; 28-lattice column; 29-cable support column; 30-straight ladder; 31-reflection surface; 32-ankle strap; 33-forefoot strap; 34-toe and forefoot bearing plate; 35-shoe sole plate; 36-bearing plate; 37-front strap; 38-rear strap; 39-rear strap; 40-front strap; 41-bearing plate. DETAILED DESCRIPTION

[0038] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] The specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present invention, and is not used to limit the present invention. Example

[0040] Combination Figures 1 to 10 As shown, this embodiment provides a giant radio telescope reflector surface inspection and maintenance system, which includes: a plurality of microgravity spiders 20 and a cableway construction mechanism;

[0041] The microgravity spider 20 includes: a sphere 1, an inflation and deflation unit, a cable collection device 5 and a hanging sling 6; the sphere 1 includes: a main airbag 9, an auxiliary airbag 10, an anchoring sling 2, a mooring sling 3, an anchoring bow, a mooring bow, a collision protection belt 11 and an observation window; the interior of the main airbag 9 is filled with helium, the auxiliary airbag 10 is arranged inside the main airbag 9, the interior of the auxiliary airbag 10 is filled with air, 9 mooring bows are arranged at intervals at the lower outer side of the main airbag 9, the upper ends of the mooring slings 3 are respectively connected to the corresponding mooring bows, and the lower ends of the mooring slings 3 are connected to the cable collection device 5; the outer middle of the main airbag 9 There are 6 mooring bows arranged at intervals in the annular direction, and the upper ends of the mooring rigging 2 are respectively connected to the corresponding mooring bows; the collision protection belt 11 is arranged at the middle and lower parts of the main airbag 9; the observation window is arranged on the outer side of the main airbag 9; the inflation and deflation unit includes: a main airbag 9 helium filling port and a secondary airbag 10 inflation port, the main airbag 9 helium filling port is arranged at the middle and lower part of the main airbag 9, as an interface for the main airbag 9 to inflate and discharge helium; the secondary airbag 10 inflation port is arranged at the bottom of the main airbag 9, as an interface for the secondary airbag 10 to inflate and discharge air; one end of the hanging rigging 6 is connected to the cable collecting device 5, and the cable collecting device 5 is provided with a counterweight unit 4;

[0042] The cableway construction mechanism includes: a cable support column 29, a pulley platform 24, a first cableway 21, a second cableway 22 and a third cableway 23. The cable support column 29 is respectively arranged at the inner and outer ring positions of the ring beam 26. The pulley platform 24 is arranged on the track of the ring beam 26 (supported by the lattice column 28. Of course, structures such as the reflective surface 31, the feed source support tower 27, and the feed source warehouse are not repeated). A straight ladder 30 is arranged between the pulley platform 24 and the horseway of the ring beam 26. The first cableway 21 One end of the first cableway 21 is connected to the cable support column 29 of the outer circle of the ring beam 26, the other end of the first cableway 21 is anchored to the concrete platform, the second cableway 22 is built between the two cable support columns 29, one end of the third cableway 23 is connected to the cable support column 29 of the inner circle of the ring beam 26, and the other end of the third cableway 23 is fixed to a measuring base pier 25 in the reflecting surface. The hanging sling 6 of the microgravity spider-man 20 can be detachably connected to the first cableway 21, the second cableway 22 and the third cableway 23 respectively.

[0043] Preferably, the giant radio telescope reflecting surface inspection and maintenance system also includes a three-way traction device; the three-way traction device includes: three traction ropes and three winches, the three winches are respectively fixed on three measuring piers 25, the three traction ropes are used to connect with the mooring rigging 2 on the sphere 1, and the free ends thereof are respectively connected with the winches located on the three measuring piers 25, and the lengths of the three traction ropes are controlled by the winches to realize auxiliary movement of the sphere 1 or limit the movement of the sphere 1.

[0044] Preferably, the giant radio telescope reflecting surface inspection and maintenance system also includes inflation and exhaust equipment; the inflation and exhaust equipment includes: an inflation pipeline and an inflation and exhaust machine, the inflation pipeline includes a high-pressure hose, an adapter and a quick-release inflation tube connected in sequence; when helium is inflated during the erection process or helium is replenished during the operation process, one end of the high-pressure hose is connected to the helium container, and the quick-release inflation tube is connected to the helium filling port of the sphere 1 airbag to carry out the corresponding inflation action; when the auxiliary airbag 10 needs to be supplemented with air during the operation process, the quick-release inflation tube is removed separately and connected with the inflation and exhaust machine and the inflation port of the auxiliary airbag 10 to realize the function of replenishing air to the auxiliary airbag 10; when withdrawn, the quick-release inflation tube is connected with the inflation and exhaust machine and the helium filling port of the main airbag 9 to realize vacuuming the main airbag 9.

[0045] Preferably, the giant radio telescope reflecting surface inspection and maintenance system further includes ground anchoring equipment;

[0046] The ground anchoring equipment includes: 6 ground anchors and a sphere 1 base. The ground anchors are evenly distributed on the circular ground with a diameter of 11m. The sphere 1 base is located directly below the sphere 1, and the upper part of the sphere 1 that contacts the sphere 1 is smooth and burr-free.

[0047] Preferably, the giant radio telescope reflector surface inspection and maintenance system also includes a release and recovery device;

[0048] The release and recovery equipment includes: a cableway pulley, a ground winch, a drone and a release and recovery protection rope; the cableway pulley is a moving tool for the sphere 1 on the cableway, and a hook is provided on the cableway pulley, which can be connected to the hanging sling 6 of the sphere 1; the ground winch is arranged around the erection point, and is used for the storage, release and recovery of the cableway and the release and recovery protection rope; the drone is a transportation equipment for the traction rope, and the traction rope is used to tow the third cableway 23 or the traction rope; the release and recovery protection rope is connected to the anchoring sling 2 through a quick release ring.

[0049] Preferably, a safety unit is provided on the sphere 1. The safety unit includes: an air valve and a pressure measuring assembly; the air valve is provided at the bottom of the auxiliary airbag 10, and the air valve has a self-sealing function when the pressure of the auxiliary airbag 10 is below 700Pa. When the pressure on both sides of the valve core of the air valve is greater than a preset threshold, the valve core automatically opens under the action of pressure to release part of the air inside the auxiliary airbag 10; the pressure measuring assembly is provided on the work suit 12 to monitor the pressure of the main airbag 9.

[0050] Preferably, the cable collecting device 5 includes: a cable collecting ring, a bearing seat, a thrust bearing, a swivel joint and a bearing seat end cover; the cable collecting ring is evenly distributed with 18 limit plates to provide a connection interface for the mooring rigging 3; the bearing seat is installed at the bottom center position of the cable collecting ring; the thrust bearing is arranged inside the bearing seat; the upper end of the swivel joint is installed in the thrust bearing; the lower end of the swivel joint is connected to the work clothes 12 through the hanging rigging 6.

[0051] Preferably, the counterweight unit 4 comprises: a release and recovery counterweight and a counterweight water tank, the release and recovery counterweight is a sandbag, and the counterweight water tank is a counterweight water tank.

[0052] Preferably, the mooring rigging 2 is made of brocade rope; the mooring rigging 2 is of a two-section structure, and the upper section and the lower section are connected by a quick-release ring; the upper end of the mooring rigging 2 is connected to the mooring bow; the lower end of the mooring rigging 2 is connected to the ground mooring equipment.

[0053] Preferably, the mooring rigging 3 is made of brocade rope; the upper end of the mooring rigging 3 is connected to the mooring bow tie, and the lower end of the mooring rigging 3 is connected to the cable gathering device 5.

[0054] Preferably, the decompression unit comprises a protective gear and a decompression plate, and the protective gear and the decompression plate are used to disperse the pressure of the operator on the reflective surface.

[0055] Preferably, the operation auxiliary equipment includes: a walkie-talkie and an anemometer configured for the operator.

[0056] Preferably, the packaging and transportation unit includes: a packaging and transportation box and auxiliary tools.

[0057] Furthermore, combined with Figures 11 to 14As shown, in this embodiment, when the microgravity spider crawls on the upper edge of the reflective surface, the reflective panel can bear a force of 30kg on an area of ​​150mm×150mm. In order to ensure that the reflective panel is not damaged when the "microgravity spider" crawls and works on the reflective panel, a special load-bearing plate is worn at the place where the person contacts the reflective surface to increase the load-bearing area.

[0058] The giant radio telescope reflecting surface inspection and maintenance system also includes: a foot bearing plate assembly, a leg bearing plate assembly and a forearm bearing plate assembly. The foot bearing plate assembly includes: a toe and a front foot bearing plate 34, a front foot strap 33 and an ankle strap 32 arranged on a sole plate 35. The toe and the front foot bearing plate 34 are hinged with the sole plate 35. The foot bearing plate assembly is used when a person wears shoes, and the front foot strap is tied first, and then the ankle strap 32 is tied. The leg bearing plate assembly includes: a front strap 37 and a rear strap 38 arranged on a bearing plate 36. The forearm bearing plate assembly includes: a front strap 40 and a rear strap 39 arranged on a bearing plate 41.

[0059] In summary, the giant radio telescope reflecting surface inspection and maintenance system can meet the requirements of high efficiency and light weight for the inspection and maintenance of the giant radio telescope reflecting surface, and will not damage the reflecting surface unit panel. The operating personnel can personally inspect the reflecting surface unit panel, the cable net node disk, the reflecting surface unit connection mechanism installed on the node disk, the measurement target and other components and other parts that need to be inspected from the upper surface of the reflecting surface at close range, and carry necessary tools to perform necessary manual maintenance on these components and parts, thereby realizing relatively reliable inspection and maintenance of the reflecting surface of the giant radio telescope. Example

[0060] Combination Figures 4 to 10As shown, the second embodiment provides a specific microgravity Spider-Man device, which includes: a sphere 1, an inflation and deflation unit, a cable collection device 5, a work suit 12 and a hanging rigging 6. The sphere 1 includes: a main airbag 9, a secondary airbag 10, an anchoring rigging 2, a mooring rigging 3, an anchoring bowtie, a mooring bowtie, a collision protection belt 11 and an observation window 18; the interior of the main airbag 9 is filled with helium, the secondary airbag 10 is arranged inside the main airbag 9, and the interior of the secondary airbag 10 is filled with air. Nine mooring bowties are arranged circumferentially at intervals on the lower outer side of the main airbag 9, and the upper ends of the mooring rigging 3 are respectively connected to the corresponding mooring bowties, and the lower ends of the mooring rigging 3 are connected to the cable collection device 5; six mooring bowties are arranged circumferentially at intervals on the middle outer side of the main airbag 9, and the upper ends of the mooring bowties are respectively connected to the corresponding mooring bowties, and the lower ends of the mooring bowties .... The main airbag 9 is connected with a corresponding anchor bow tie; the collision protection belt 11 is arranged at the middle and lower part of the main airbag 9; the observation window 18 is arranged on the outside of the main airbag 9; the inflation and deflation unit includes: the main airbag 9 helium filling port and the auxiliary airbag 10 inflation port, the main airbag 9 helium filling port is arranged at the middle and lower part of the main airbag 9, as the interface for the main airbag 9 to inflate and discharge helium; the auxiliary airbag 10 inflation port is arranged at the bottom of the main airbag 9, as the interface for the inflation and deflation of air of the auxiliary airbag 10; one end of the hanging sling 6 is connected to the cable collection device 5, and the other end of the hanging sling 6 is connected to the work clothes 12, and the cable collection device 5 is provided with a counterweight unit 4. This embodiment uses a helium balloon to hang an operator and a counterweight, etc., and the total weight of the equipment is adjusted to 5-15kg through the counterweight, and enters the FAST reflection surface. The operator can move in the reflection surface to inspect and maintain the mechanism and structure of the reflection surface.

[0061] In this embodiment, preferably, the main airbag 9 includes: 18 pieces of cut pieces 15, a sealing strip 14, a heat sealing strip 13 and a plug; the cover cloth of the main airbag 9 adopts 18 pieces of cut pieces 15 heat-sealed and connected to form a round sphere 1 structure; the cut pieces 15 located on the inner side of the main airbag 9 are connected by the heat sealing strip 13; the cut pieces 15 located on the outer side of the main airbag 9 are connected by the sealing strip 14; the cut pieces 15 form process openings at their upper and lower ends respectively, and the plugs are encapsulated in the process openings.

[0062] In this embodiment, preferably, the auxiliary airbag 10 includes: 18 pieces of cut pieces 15, a sealing strip 14, a heat-sealed strip 13, a plug and a skirt 16; the auxiliary airbag 10 is arranged inside the main airbag 9, and the cover cloth of the auxiliary airbag 10 adopts 18 pieces of cut pieces 15 heat-sealed and connected to form a circular spherical crown structure; located on the inner side of the auxiliary airbag 10, adjacent cut pieces 15 are connected by heat-sealed strips 13; located on the outer side of the auxiliary airbag 10, adjacent cut pieces 15 are connected by sealing strips 14; the cut pieces 15 form a process opening at their upper ends, and the plug is sealed in the process opening; the upper end of the skirt 16 is heat-sealed to the cover cloth of the auxiliary airbag 10, and the lower end of the skirt 16 is heat-sealed to the cover cloth of the main airbag 9 using a T-shaped structure.

[0063] Specifically, the detailed design of sphere 1 is as follows:

[0064] 1) Main airbag 9 design

[0065] The main airbag 9 comprehensively considers many factors that meet the material engineering application, such as processing technology, force transmission rationality, material utilization, etc. The main airbag 9 is butted in the length direction (material warp direction), and the main airbag 9 is divided into 18 willow-leaf-shaped pieces 15 along the circumferential direction (material weft direction). In this way, the force form of the airbag is reasonable and the airbag material can be fully utilized.

[0066] The connection between the main airbag 9 pieces 15 is in the form of heat-sealed docking. The inner side of the main airbag body is connected with a 60mm wide HVH-700 heat-sealed strip 13 to connect the adjacent pieces 15, and the outer side is pasted with a 40mm wide MF01 sealing strip 14. Since the width of the two ends of the main airbag 9 pieces 15 is small, it is difficult to heat-seal. In order to facilitate the processing of the airbag, a φ700mm process opening is opened at each end, and a plug is designed for sealing. In addition, the surface of the main airbag 9 is provided with an observation window 18, a helium filling port of the main airbag 9, an inflation port of the auxiliary airbag 10, an air valve and other components. The opening is made on the airbag according to the size of the installation equipment, and a lining cloth is designed inside the airbag for reinforcement.

[0067] 2) Design of auxiliary airbag 10

[0068] The auxiliary airbag 10 mainly adjusts the pressure of the airbag and maintains the shape of the airbag. The cover of the auxiliary airbag 10 is made of high-performance coated fabric material, which has the advantages of light weight, rubbing resistance, and low air permeability. The auxiliary airbag 10 is formed by butt-jointing and heat-sealing 18 pieces of cut pieces 15. The cut pieces 15 are flat parts formed by spherical petals and then unfolding according to the curved surface method. In order to make the auxiliary airbag 10 fit more closely with the airbag, a skirt 16 is arranged at the lower end of the cover of the auxiliary airbag 10. The skirt 16 is connected to the cover of the auxiliary airbag 10 by heat-sealing, and is connected to the cover of the airbag by T-shaped structure heat-sealing.

[0069] 3) Material selection

[0070] According to the characteristics of the airbag structure, the airbag and auxiliary airbag 10 materials are selected from soft composite materials, which are required to meet the requirements of strength, airtightness, weight and life. At the same time, the material varieties and specifications should be as few as possible, the price should be appropriate, and the process should be convenient. Through visits and surveys of domestic material manufacturers, it was finally determined that the bladder material was selected. The airbag material is OP22-1000, the auxiliary airbag 10 material is HPH-300, the heat-sealed cloth material is HVH-700, and the sealing strip 14 material is MF01. The performance indicators are shown in the table below.

[0071]

[0072] In this embodiment, preferably, the mooring rigging 2 is made of brocade rope; the mooring rigging 2 is of two-section structure, and the upper section and the lower section are connected by a quick release ring; the upper end of the mooring rigging 2 is connected to the mooring bow tie; the lower end of the mooring rigging 2 is connected to the ground mooring equipment (for example: the ground tripod 8 of the small nest concrete floor 7). In this embodiment, preferably, the mooring rigging 3 is made of brocade rope; the upper end of the mooring rigging 3 is connected to the mooring bow tie, and the lower end of the mooring rigging 3 is connected to the cable collection device 5.

[0073] Specifically, the rigging is divided into two groups according to its function, one group is the mooring rigging 3, which is used to hang the manned subsystem on the balloon subsystem, and the other group is the mooring rigging 2, which is used for ground mooring of the system.

[0074] The mooring rigging 3 uses a φ6mm silk rope, the upper end of the rigging is connected to the mooring bow knot, and the lower end is connected to the cable collection device 5; the anchoring rigging 2 uses a φ9mm silk rope, and the anchoring rigging 2 adopts a two-stage structure and is connected with a φ6 stainless steel quick-release ring. The upper end is connected to the mooring bow knot, and the lower end is connected to the ground anchor. In normal working state, the anchoring rigging 2 is separated from the quick-release ring, and the three strands of the upper section of the anchoring rigging 2 are fixed to the quick-release ring of the mooring rigging 3, and the other three strands are connected to the three-way traction equipment. The lower section of the anchoring rigging 2 is placed on the ground. The mooring rigging 3 is connected to the cable collection ring through a quick-release buckle. The cable collection ring is made of 304 steel pipe bent and welded, and is an important load-bearing connector. The 9 connecting lugs are evenly distributed on the circumference of the steel pipe. The total weight of the entire suspension is 1205.4N, and the load of a single rigging is 133.9N. The mooring rigging 3 uses a φ6 silk rope with a strength limit of 5000N, and the strength limit of the quick release ring and the mooring bow is 8000N. Considering the light aging coefficient of the rigging of 0.8 and the knotting coefficient of 0.85, the safety factor of the mooring rigging 3 is 25.4, which meets the requirement of 10 times the safety factor; the safety factor of the quick release ring and the mooring bow is 59.7, which meets the requirement of 10 times the safety factor.

[0075] The maximum load of a single anchor rigging 2 is 1676.8N. The strength limit of the φ9 silk rope of the anchor rigging 2 is 10000N, and the strength limit of the quick release ring and the anchor bow is 8000N. Considering the light aging coefficient of the rigging of 0.8 and the knotting coefficient of 0.85, the safety factor of the anchor rigging 2 is 4.06, which meets the requirement of 4 times the safety factor; the safety factor of the quick release ring and the anchor bow is 4.77, which meets the requirement of 4 times the safety factor.

[0076]

[0077] In this embodiment, preferably, 9 mooring bows are arranged at the lower part of the outer side of the airbag and connected to the mooring rigging 3 to transfer the concentrated load of the microgravity spiderman; 6 anchoring bows are evenly distributed on the circumference above the mooring bows, which are used to fix the sphere 1 when anchored on the ground. According to the load calculation, the strength limit requirement of a single bow is 6707.2N. The bow is composed of two layers of lining cloth and a load-bearing rope. The lining cloth is used to fix the load-bearing rope and connect to the airbag. The load-bearing rope is connected to the rigging to transfer the concentrated load.

[0078] In this embodiment, preferably, a safety unit is provided on the sphere 1, and the safety unit includes: an air valve and a pressure measuring assembly; the air valve is provided at the bottom of the auxiliary airbag 10, and the air valve has a self-sealing function when the pressure of the auxiliary airbag 10 is below 700Pa, and when the pressure on both sides of the valve core of the air valve is greater than a preset threshold, the valve core automatically opens under the action of pressure to release part of the air inside the auxiliary airbag 10; the pressure measuring assembly is provided on the work suit 12, and is used to monitor the pressure of the main airbag 9.

[0079] Among them, during the operation of the sphere 1, in order to adapt to the external atmospheric pressure changes, solar heat radiation and other factors, and to keep the pressure difference between the inside and outside of the sphere body within the specified pressure value, the auxiliary airbag 10 needs to be exhausted through the air valve to achieve the purpose of reducing the pressure of the sphere 1. There are two ways to exhaust air with the air valve: mechanical automatic exhaust and manual exhaust. On the other hand, when the air in the auxiliary airbag 10 is exhausted and the entire airbag still exceeds the specified safety pressure difference range, the helium in the airbag is manually discharged through the helium filling port to achieve the pressure reduction of the sphere 1.

[0080] The upper limit of the working pressure of the air valve should not be greater than the pressure value of sphere 1 corresponding to the maximum design stress of the airbag when sphere 1 is working in the air. The lower limit of the working pressure of the air valve should be the middle value of the working pressure of sphere 1 based on experience, that is, when the airbag pressure is higher than the upper limit of the working pressure of the air valve, the air valve is opened to release air, and when the airbag pressure is lower than the lower limit of the working pressure of the air valve, the air valve is closed.

[0081] Air valve flow area calculation

[0082] Total exhaust volume Q

[0083]

[0084] Where:

[0085] ——Gravity acceleration, 9.8 ;

[0086] ——Gas constant of air, 287.053 ;

[0087] ——Total volume of the sphere, 230m 3 ;

[0088] ——Maximum ascent speed, 2m / s;

[0089] ——Atmospheric temperature at a fixed altitude.

[0090] Total circulation area A;

[0091]

[0092] Where:

[0093] ——Valve flow coefficient, 0.5;

[0094] ——The atmospheric density at a fixed altitude has a maximum value of 1.019 kg / m 3 ;

[0095] ——Valve opening overpressure value, 700Pa.

[0096] The flow area of ​​the auxiliary airbag air valve calculated by the above equation is not less than 0.0033m 2 .

[0097] Valve sealing pressure analysis

[0098] To ensure that when the pressure is too high due to disturbances such as wind, the air valve can be opened by the gas in the auxiliary airbag 10 to reduce the pressure and ensure the relative safety of the airbag pressure; at the same time, considering the relative air tightness of the auxiliary airbag 10, the sealing pressure of the valve of the auxiliary airbag 10 is selected to be 700Pa.

[0099] The air valve is installed on the plug at the bottom of the airbag and connected to the plug through the inner and outer mounting plates. It has a self-sealing function when the pressure of the auxiliary airbag is below 700Pa. When the pressure on both sides of the valve core is greater than the preset threshold, the valve core automatically opens under the pressure to release some air. After calculation, the air valve flow area requirement is 0.0033m 2 The designed air valve diameter is 195mm and the opening is 20mm to meet the use requirements.

[0100] Among them, the pressure measuring component is mainly composed of three parts: a pressure measuring interface, a silicone tube and a handheld pressure gauge. The pressure measuring interface consists of a pressure measuring joint and a crimping nut. The pressure measuring tube is connected to the pressure measuring port and fixed by a crimping nut. The appearance of the pressure measuring joint is similar to the airtight head of the inflation port and can be seamlessly connected to the inflation port. The pressure gauge uses an industrial-grade shelf product with a range of 10Kpa, an accuracy of ±5Pa, a built-in 4.5VDC battery, and a digital LCD display. The pressure gauge is fixed on the work clothes 12 through the installation interface, which is convenient for the staff to observe the pressure of the main airbag 9 in real time.

[0101] In this embodiment, preferably, the cable gathering device 5 includes: a cable gathering ring, a bearing seat, a thrust bearing, a swivel joint and a bearing seat end cover; the cable gathering ring is evenly distributed with 18 limit plates to provide a connection interface for the mooring rigging 3; the bearing seat is installed at the bottom center position of the cable gathering ring; the thrust bearing is arranged inside the bearing seat; the upper end of the swivel joint is installed in the thrust bearing; the lower end of the swivel joint is connected to the work clothes 12 through the hanging rigging 6.

[0102] In this embodiment, preferably, when the sphere 1 is working at a position where the slope angle reaches 60°, a flexible protective device should be provided at the position of the sphere 1 closest to the slope or the ring beam bridleway, so as to protect the sphere 1 and the slope. In addition, the tensioning of the three-way traction equipment coordinated by the intercom can also prevent the sphere 1 from colliding with the adjacent foundation, slope or ring beam bridleway structure. The flexible protective device adopts a 5mm thick rubber-plastic sponge material and is directly pasted on the designated area of ​​the airbag. According to the requirements of the general layout diagram, a collision protection belt 11 with a width of 600mm is arranged in the middle of the sphere 1, and a collision protection belt 11 with a width of 500mm is arranged at the theoretical contact position of the sphere 1 and the 60° slope at the lower part of the sphere 1.

[0103] In this embodiment, preferably, in order to facilitate observation of the interior of the auxiliary airbag 10, an observation window 18 is arranged on the main airbag 9. The observation window 18 is designed as an airtight structure, aviation plexiglass is selected, and is fixed to the airbag cover with bolts through a metal fixing plate, a silicone gasket, etc.

[0104] In this embodiment, preferably, a rain curtain is provided at the annular portion in the middle and lower part of the main airbag 9. Specifically, the microgravity spider man may work in rainy weather. To prevent the workers from getting wet, a rain curtain is provided at the annular portion with a diameter of 5.6m in the middle and lower part of the sphere 1. The rain curtain is 100mm high, and the portion where it is connected to the sphere 1 is a T-shaped structure. The connection between the rain curtain and the sphere 1 is adhesive bonding.

[0105] In this embodiment, preferably, the inflation and deflation unit includes two parts: the main airbag 9 helium filling port and the auxiliary airbag 10 inflation port. It is mainly used as an interface for the initial helium filling of the main airbag 9, the replenishment of helium when anchored on the ground, the recovery of helium, and the inflation of air in the auxiliary airbag 10. It can also be used as a channel for discharging a small amount of residual helium in the airbag when the sphere 1 is withdrawn. Except for the different installation positions, the main airbag 9 helium filling port and the auxiliary airbag 10 inflation port are exactly the same in other structural forms and installation methods. The main airbag 9 helium filling port and the auxiliary airbag 10 inflation port use a safety valve for kayaking. The safety valve is mainly composed of a valve body and an airtight head, wherein the valve body is connected to the bag skin by a threaded connection + adhesive connection, and the opening diameter of the main airbag 9 is 40mm. The main airbag 9 helium filling port is installed in the lower middle part of the main airbag 9, and the auxiliary airbag 10 inflation port is installed at the bottom of the main airbag 9.

[0106] In this embodiment, preferably, the surface density of the main airbag 9 material is ≤252g / m 2 , the minimum tensile strength in the warp direction is ≥26.7N / mm, the minimum tensile strength in the weft direction is ≥26.7N / mm; the surface density of the auxiliary airbag 10 material is ≤200g / m 2 , tensile strength ≥2.5N / mm; the diffusion radius of the bow tie ≥150mm, tensile strength ≥6707.2N; the tensile strength of the mooring rigging 3 ≥1339N; the tensile strength of the anchoring rigging 2 ≥6707.2N. Example

[0107] Combination Figures 1 to 10 As shown, this embodiment 3 also provides a method for inspecting the reflecting surface of a giant radio telescope according to the embodiment 1, which comprises the following steps:

[0108] S1. Anchor the microgravity Spider-Man 20 on the concrete platform outside the reflecting surface of the giant radio telescope;

[0109] S2. Build a cableway for the microgravity spider man 20 to enter the reflecting surface, including: a first cableway 21, a second cableway 22 and a third cableway 23. By installing two cable support columns 29 on the inner and outer circles of the ring beam 26, and installing a pulley platform 24 on the track of the ring beam 26, the first cableway 21 is built between the concrete platform and the cable support column 29 on the outer circle of the ring beam 26, the second cableway 22 is built between the two cable support columns 29, and the third cableway 23 is built between the cable support column 29 on the inner circle of the ring beam 26 and the measurement pier to be inspected;

[0110] S3, adjusting the overall buoyancy of the microgravity spider man 20 to a first predetermined value, so that the microgravity spider man 20 rises along the first cableway 21 to the pulley platform 24 on the ring beam 26 under the action of the buoyancy; adjusting the overall weight of the microgravity spider man 20 to a second predetermined value on the pulley platform 24, transferring the microgravity spider man 20 from the first cableway 21 to the second cableway 22, and moving along the second cableway 22 to the third cableway 23, and under the action of gravity, making the microgravity spider man 20 descend along the third cableway 23 to the measurement pier to be inspected in the reflection surface;

[0111] S4. The operator completes the connection with the hanging sling 6 of the microgravity spider-man 20 on the measuring pier to be inspected, and respectively connects the microgravity spider-man 20 to the three-way positioning traction ropes, adjusts the overall weight of the microgravity spider-man 20 carrying the operator to a third preset value, and fastens an auxiliary rope with a vertical reflective surface on the pier guardrail. The operator descends to the reflective surface along the auxiliary rope to inspect and maintain the reflective surface.

[0112] It can be seen that this method can meet the requirements of high efficiency in the inspection and maintenance of the reflecting surface of the giant radio telescope, is light in weight and will not damage the reflecting surface unit panel, and the operating personnel can personally inspect the reflecting surface unit panel, the cable net node disk, the reflecting surface unit connection mechanism installed on the node disk, the measurement target and other components and other parts that need to be inspected from the upper surface of the reflecting surface at close range, and carry necessary tools to perform necessary manual maintenance on these components and parts, thereby realizing relatively reliable inspection and maintenance of the reflecting surface of the giant radio telescope.

[0113] In this embodiment, preferably, in step S1, anchoring the microgravity spider-man 20 on a concrete platform outside the reflecting surface of the giant radio telescope includes: providing a ground anchoring device on the concrete platform outside the reflecting surface of the giant radio telescope; connecting the lower ends of the three anchoring riggings 2 of the microgravity spider-man 20 to the ground anchoring device through O-shaped carabiners respectively; connecting the hanging rigging 6 at the lower end of the microgravity spider-man 20 to the ground anchoring device through an O-shaped carabiner.

[0114] In this embodiment, preferably, in step S2, the construction of the first cableway 21 includes: connecting one end of the first cableway 21 to the cable support column 29 of the outer ring of the ring beam 26, and throwing the other end of the first cableway 21 to the concrete platform outside the reflecting surface, and anchoring it to the ground anchoring equipment on the concrete platform; the construction of the second cableway 22 includes: connecting one end of the second cableway 22 to the cable support column 29 of the outer ring of the ring beam 26, and connecting the other end of the third cableway 23 to the cable support column 29 of the inner ring of the ring beam 26; the construction of the third cableway 23 includes: connecting the pulley platform 24 of the ring beam 26 to the cable support column 29 of the inner ring of the ring beam 26; One end of the process rope of the third cableway 23 is towed by a drone to the measuring pier to be inspected within the reflecting surface, and the personnel at the measuring pier catch the process rope. The personnel on the pulley platform 24 of the ring beam 26 connect the process rope of the third cableway 23 to the third cableway 23. The personnel at the measuring pier pull the process rope, pull one end of the third cableway 23 to the measuring pier and fix it to the measuring pier, and the personnel at the pulley platform 24 fix one end of the third cableway 23 on the side of the ring beam 26 to the top of the inner ring rope support column 29 of the ring beam 26 to keep the third cableway 23 at an appropriate verticality.

[0115] In this embodiment, preferably, step S2 also includes the construction of three traction ropes, which includes: the drone is released from the measuring base to be inspected, and the process rope with the first traction rope flies to the first measuring base adjacent to the measuring base to be inspected, and the personnel on the first measuring base catch the process rope, and pull the process rope to pull the first traction rope to the first measuring base; the drone is released from the measuring base to be inspected, and the process rope with the second traction rope flies to the second measuring base adjacent to the measuring base to be inspected, and the personnel on the second measuring base catch the process rope, and pull the process rope to pull the second traction rope to the second measuring base; the measuring base to be inspected is provided with a third traction rope, and the three traction ropes constitute a three-way positioning traction rope, and the area surrounded by the three measuring bases connected with the traction ropes is the inspection and maintenance area of ​​the microgravity spider-man 20.

[0116] In this embodiment, preferably, in step S3, adjusting the overall buoyancy of the microgravity spider-man 20 to a first predetermined value includes: controlling the first predetermined value to be 10-15 kg by adjusting the counterweight unit 4; disconnecting the three anchoring slings 2 of the microgravity spider-man 20 from the ground anchoring equipment, moving the microgravity spider-man 20 to the first cableway 21, and putting the O-ring mountaineering buckle of the hanging rope on the first cableway 21, so that the microgravity spider-man 20 floats to the top of the first cableway 21.

[0117] In this embodiment, preferably, in step S3, adjusting the overall weight of the microgravity spider-man 20 to a second predetermined value on the pulley platform 24 includes: controlling the second predetermined value to be 5 kg by adjusting the counterweight unit 4; a person at the pulley platform 24 of the ring beam 26 transfers the microgravity spider-man 20 to the pulley platform 24, and puts the O-ring carabiner of the hanging rope on the anchor seat of the pulley platform 24, adjusts the weight of the microgravity spider-man 20 to 5 kg, puts the O-ring carabiner of the hanging rope of the microgravity spider-man 20 on the second cableway 22, moves the microgravity spider-man 20 to the third cableway 23, and then puts the O-ring carabiner of the hanging rope of the microgravity spider-man 20 on the third cableway 23, so that the microgravity spider-man 20 descends along the third cableway 23 to the measurement base pier to be inspected in the reflecting surface.

[0118] In this embodiment, preferably, in step S3, adjusting the overall weight of the microgravity spider-man 20 carrying the operator to a third preset value includes: controlling the third preset value to be 15Kg by adjusting the counterweight unit 4; connecting three traction ropes to the three anchoring slings 2 of the microgravity spider-man 20 on the measuring pier to be inspected, and connecting an auxiliary rope at an appropriate position of the guardrail surface tube of the measuring pier to be inspected, with the other end of the auxiliary rope hanging down to the reflective panel, and the operator carried by the microgravity spider-man 20 descends into the reflective surface holding the auxiliary rope.

[0119] In this embodiment, preferably, in step S4, the inspection and maintenance of the reflecting surface includes: the microgravity spider-man 20 enters the reflecting surface and crawls forward. During the inspection and maintenance, the personnel who control the traction ropes on the three measuring piers choose to retract and release the traction ropes according to the crawling position of the operator to keep the traction ropes at an appropriate vertical angle; when encountering an emergency so that the microgravity spider-man 20 cannot crawl and position itself, the personnel who control the traction ropes on the three measuring piers retract the ropes to fix the position of the microgravity spider-man 20, and when the emergency is resolved, release the traction ropes to allow the operator to continue to crawl freely.

[0120] In this embodiment, preferably, in step S4, inspecting and maintaining the reflecting surface includes: when the microgravity spider-man 20 is crawling on the upper edge of the reflecting surface, it is outside the third circle of measuring piers on the upper part of the reflecting surface, and one of the three traction ropes needs to be connected to the ring beam 26 horse trail guardrail, and the remaining two traction ropes are on two measuring piers adjacent to the third circle of measuring piers.

[0121] In this embodiment, preferably, the method also includes step S5: when the inspection and maintenance is completed, the microgravity spider-man 20 returns to the measuring pier where the third cableway 23 is located, the operator and the three traction ropes are disconnected from the microgravity spider-man 20, the overall weight of the microgravity spider-man 20 is adjusted to a buoyancy of 10 kg, the O-ring carabiner of the microgravity spider-man 20 hanging rope is put on the third cableway 23, so that the microgravity spider-man 20 floats to the top of the third cableway 23, the O-ring carabiner of the microgravity spider-man 20 hanging rope is put on the second cableway 22, the overall weight of the microgravity spider-man 20 is adjusted to 10 kg, the O-ring carabiner of the microgravity spider-man 20 hanging rope is put on the first cableway 21, the microgravity spider-man 20 is dropped to the bottom of the first cableway 21, and then the microgravity spider-man 20 is anchored to the concrete platform.

[0122] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements 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.

Claims

1. A giant radio telescope reflecting surface inspection and maintenance system, characterized in that: include: Several microgravity spidermen and ropeway construction mechanisms; The microgravity spider-man comprises: a sphere, an inflation and deflation unit, a cable collection device and a hanging rigging; the sphere comprises: a main airbag, a secondary airbag, an anchoring rigging, a mooring rigging, an anchoring bowtie, a mooring bowtie, a collision protection belt and an observation window; the interior of the main airbag is filled with helium, the secondary airbag is arranged inside the main airbag, the interior of the secondary airbag is filled with air, 9 mooring bowties are arranged circumferentially at intervals on the lower outer side of the main airbag, the upper ends of the mooring rigging are respectively connected to the corresponding mooring bowties, and the lower ends of the mooring rigging are connected to the cable collection device; 6 Anchor bow, the upper ends of the anchor rigging are respectively connected to the corresponding anchor bow; the collision protection belt is arranged at the middle and lower parts of the main airbag; the observation window is arranged on the outer side of the main airbag; the inflation and deflation unit comprises: a main airbag helium inflation port and a secondary airbag inflation port, the main airbag helium inflation port is arranged at the middle and lower part of the main airbag, serving as an interface for the main airbag to inflate and deflate helium; the secondary airbag inflation port is arranged at the bottom of the main airbag, serving as an interface for the secondary airbag to inflate and deflate air; one end of the hanging rigging is connected to the cable collecting device, and a counterweight unit is arranged on the cable collecting device; The cableway construction mechanism comprises: a cable support column, a pulley platform, a first cableway, a second cableway and a third cableway, wherein the cable support columns are respectively arranged at the inner and outer ring positions of the ring beam, the pulley platform is arranged on the track of the ring beam, a straight ladder is arranged between the pulley platform and the ring beam horseway, one end of the first cableway is connected to the cable support column of the outer ring of the ring beam, the other end of the first cableway is anchored to the concrete platform, the second cableway is built between the two cable support columns, one end of the third cableway is connected to the cable support column of the inner ring of the ring beam, the other end of the third cableway is fixed to a measurement base pier in the reflection surface, and the microgravity Spider-Man's hanging rigging can be detachably connected to the first cableway, the second cableway and the third cableway respectively; It also includes a three-way traction device; the three-way traction device includes: three traction cables and three winches, the three winches are respectively fixed to three measuring piers, the three traction cables are used to connect with the mooring rigging on the sphere, and the free ends thereof are respectively connected with the winches located on the three measuring piers, and the lengths of the three traction cables are controlled by the winches to realize auxiliary movement of the sphere or limit movement of the sphere; It also includes an inflation and exhaust device; the inflation and exhaust device includes: an inflation pipeline and an inflation and exhaust machine, the inflation pipeline includes a high-pressure hose, an adapter and a quick-install inflation tube connected in sequence; when helium is inflated during the erection process or helium is replenished during the operation process, one end of the high-pressure hose is connected to the helium container, and the quick-install inflation tube is connected to the helium filling port of the spherical airbag to carry out the corresponding inflation action; when the auxiliary airbag needs to be supplemented with air during the operation, the quick-install inflation tube is removed separately and connected with the inflation and exhaust machine and the inflation port of the auxiliary airbag to realize the function of supplementing air to the auxiliary airbag; when withdrawn, the quick-install inflation tube is connected with the inflation and exhaust machine and the helium filling port of the main airbag to realize vacuuming of the main airbag.

2. The giant radio telescope reflecting surface inspection and maintenance system according to claim 1 is characterized in that: Also includes ground mooring equipment; The ground anchoring equipment includes: 6 ground anchors and a spherical base. The ground anchors are evenly distributed on a circular ground with a diameter of 11m. The spherical base is located directly below the sphere, and the upper part of the spherical base that contacts the sphere is smooth and free of burrs.

3. The giant radio telescope reflecting surface inspection and maintenance system according to claim 1 is characterized in that: It also includes release and recovery equipment; The release and recovery equipment includes: a cableway pulley, a ground winch, a drone and a release and recovery protection rope; the cableway pulley is a tool for moving the sphere on the cableway, and a hook is provided on the cableway pulley, and the hook can be connected to the hanging rigging of the sphere; the ground winch is arranged around the erection point, and is used for storing, releasing and recovering the cableway and the release and recovery protection rope; the drone is a transportation equipment for the traction rope, and the traction rope is used to tow a third cableway or a traction rope; the release and recovery protection rope is connected to the anchoring rigging through a quick-release ring.

4. The giant radio telescope reflecting surface inspection and maintenance system according to claim 1, characterized in that: A safety unit is arranged on the sphere, and the safety unit comprises: an air valve and a pressure measuring assembly; the air valve is arranged at the bottom of the auxiliary airbag, and the air valve has a self-sealing function when the pressure of the auxiliary airbag is below 700Pa, and when the pressure on both sides of the valve core of the air valve is greater than a preset threshold, the valve core automatically opens under the action of pressure to release part of the air inside the auxiliary airbag; the pressure measuring assembly is arranged on the work clothes to monitor the pressure of the main airbag.

5. The giant radio telescope reflecting surface inspection and maintenance system according to claim 1, characterized in that: The cable gathering device includes: a cable gathering ring, a bearing seat, a thrust bearing, a swivel joint and a bearing seat end cover; the cable gathering ring is evenly distributed with 18 limit plates to provide a connection interface for the mooring rigging; the bearing seat is installed at the bottom center position of the cable gathering ring; the thrust bearing is arranged inside the bearing seat; the upper end of the swivel joint is installed in the thrust bearing; the lower end of the swivel joint is connected to the work clothes through a hanging rigging.

6. The giant radio telescope reflecting surface inspection and maintenance system according to claim 1, characterized in that: The counterweight unit includes: a release and recovery counterweight and a counterweight water tank. The release and recovery counterweight is a sandbag, and the counterweight water tank is a counterweight water tank.

7. The giant radio telescope reflecting surface inspection and maintenance system according to claim 1, characterized in that: The mooring rigging adopts brocade rope; the mooring rigging adopts a two-section structure, and the upper section and the lower section are connected by a quick-release ring; the upper end of the mooring rigging is connected to the mooring bow; the lower end of the mooring rigging is connected to the ground anchoring equipment.

8. The giant radio telescope reflecting surface inspection and maintenance system according to claim 1, characterized in that: The mooring rigging adopts brocade rope; the upper end of the mooring rigging is connected with the mooring bow knot, and the lower end of the mooring rigging is connected with the rope gathering device.

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