Cage cable transverse movement method and device for high-altitude inspection and maintenance of FAST cable driving tackle

Abstract

The invention discloses a cage cable transverse movement method and device for high-altitude inspection and maintenance of a FAST cable driving tackle, and the method comprises the following steps: S1, controlling a cable crane to annularly run along a ring beam to a position corresponding to a steel wire rope needing to be maintained at present, the lower anchoring end of the cableway is fixed to the corresponding first lifting pulley platform through a bow shackle A and a bow shackle B of the double-limb pressing rigging, and at the moment, the lower anchoring end of the cableway is in single-platform double-point connection; controlling the cableway hanging basket to move along the cableway to be close to the tackle needing to be maintained, and completing the maintenance operation of the current steel wire rope on the tackle; s2, after tackle inspection and maintenance operation on the current steel wire rope is completed, cableway single-platform double-point connection is converted into double-platform single-point connection; the bow shackle B of the double-limb pressing rigging at the lower anchoring end of the cableway is moved to the second lifting pulley platform; s3, converting cableway double-platform single-point connection into single-platform single-point connection; and S4, transferring to a steel wire rope position for maintenance.

Description

Technical Field

[0001] The invention relates to the technical field of astronomical observation and equipment maintenance, and in particular to a method and device for lateral movement of a cage cable (cableway) for high-altitude inspection and maintenance of a FAST cable-driven pulley. Background Art

[0002] The Five-hundred-meter Aperture Spherical radioTelescope (FAST) consists of more than 4,000 reflector units forming a 500-meter spherical active reflector. It uses a lightweight six-cable drag mechanism and parallel robots to achieve high-precision positioning of the telescope receiver. The telescope includes four major process systems: reflector system, feed support system, measurement and control system, and feed and receiver system.

[0003] The cable drive mechanism in the feed support system, namely the flexible cable traction parallel robot, retracts and releases six steel wire ropes through six sets of winch drive mechanisms and control systems distributed in the machine room at the bottom of the tower, and tractions the 30-ton feed cabin in parallel to move at an altitude of about 140 meters and a range of about 200 meters, so as to achieve the preliminary tracking of the astronomical trajectory by the feed cabin and the preliminary positioning of the feed receiver in the cabin. There are 65 pulleys hanging on each steel wire rope, and cables and optical cables are hung on the pulleys as channels for power supply and signal transmission of equipment in the feed cabin. Adjacent pulleys are connected by double stainless steel wire ropes (traction ropes) to pull them together to prevent the cables or optical cables from being stressed. In order to maximize the service life of the equipment, the pulleys of the FAST cable drive mechanism need to be regularly and comprehensively inspected and maintained. The wire ropes, pulleys, cables and traction ropes of the rope drive mechanism are at high altitudes all year round, with poor accessibility and high risks. Equipment inspection and maintenance are relatively difficult. Once a problem occurs, the only options are to lower the cabin and loosen the wire ropes, and get as close to the reflective surface as possible. Workers then have to climb up and straddle the wire ropes and pulleys for inspection and maintenance. The working surface is narrow and the safety risks for workers working at heights are high. Summary of the invention

[0004] The purpose of the present invention is to provide a method and device for lateral movement of a cage rope (cableway) for high-altitude inspection and maintenance of a FAST cable-driven pulley. During the shutdown and maintenance of FAST, the device can accurately and efficiently transport maintenance personnel to the vicinity of equipment such as high-altitude pulleys that need to be inspected and maintained. The device also provides a platform for maintenance personnel to work at high altitude, effectively solving the shortcomings of the prior art, such as poor accessibility of maintenance personnel, high safety risks of climbing close to the pulley by hand, and narrow working surface, thereby improving work efficiency.

[0005] To achieve the above-mentioned purpose, the present invention provides a method for lateral movement of a cage cable (cableway) for high-altitude inspection and maintenance of a FAST cable-driven pulley, which is applied to a FAST telescope having a reflecting surface system and a feed source support system; in the feed source support system, six supporting towers lead out six steel wires to control the feed source cabin to move on the focal plane of the telescope to cooperate with astronomical observations, and a plurality of pulleys for hanging cables and optical cables are arranged on each steel wire, a feed source cabin docking platform is arranged at the center of the reflecting surface, and a ring beam is arranged around the reflecting surface; three lifting pulley platforms are evenly arranged around the cabin docking platform, namely, a first lifting pulley platform, a second lifting pulley platform and a third lifting pulley platform, and a movable cable crane is arranged on the ring beam; a cableway is arranged between the lifting pulley platform and the cable crane, and the cableway hanging basket is controlled to move along the cableway to the vicinity of the pulley that needs maintenance to carry out inspection and maintenance operations; the lateral movement method comprises the following steps:

[0006] Step S1. Control the cable crane to move along the ring beam to the position corresponding to the steel wire rope that needs maintenance, and fix the lower anchor end of the cableway to the corresponding first lifting pulley platform through the bow shackle A and bow shackle B of the double-limb pressing rigging. At this time, the lower anchor end of the cableway is a single platform double-point connection; control the cableway hanging basket to move along the cableway to the vicinity of the pulley that needs maintenance, and complete the maintenance operation of the pulley on the current steel wire rope;

[0007] Step S2. After completing the inspection and repair work of the pulley on the current wire rope, convert the cableway single-platform double-point connection into a double-platform single-point connection by moving the ring beam cable crane; move the bow-shaped shackle B of the double-limb pressing rigging at the lower anchor end of the cableway to the second lifting pulley platform;

[0008] Step S3. The cable hanger is adjusted by forward and reverse movement to convert the double-platform single-point connection of the cableway into a single-platform single-point connection;

[0009] Step S4. Move to the wire rope position to carry out maintenance work.

[0010] Further, step S1 includes:

[0011] S1.1. Move the cable crane to a position parallel to the cable drive wire rope, adjust the verticality of the load rope, safety rope and traction rope to meet the requirements of hanging the cableway basket, and complete the pulley maintenance of a cable drive wire rope at the position of the first lifting pulley platform by moving the cableway basket obliquely and up and down and adjusting the verticality of the cable drive wire rope through the hoist;

[0012] S1.2. Recover the cableway basket to the lower platform of the cable crane, move it by the cable crane to be parallel to the other feed cabin cable at the position of the first lifting pulley platform, adjust the verticality of the load rope, safety rope and traction rope, and complete the pulley maintenance of the other feed cabin cable at the position of the first lifting pulley platform by moving the cableway basket and the feed cabin cable obliquely and up and down by the hoist;

[0013] S1.3. Then retract the hanging basket to the lower platform of the cable crane, loosen the load-bearing rope, safety rope and traction rope of the maintenance system as close to the reflecting surface as possible, and prepare the load-bearing rope, safety rope and traction rope to move with the cable crane.

[0014] Further, step S2 includes:

[0015] S2.1, start the cable crane and move it along the ring beam until the load-bearing rope is parallel to the long side of the first lifting pulley platform and stops;

[0016] S2.2. Unfasten the bow-shaped shackle B of the double-limb pressing rigging of the load rope, safety rope and traction rope buckled on the cantilever rotating lifting ring of the box-shaped column of the first lifting pulley platform;

[0017] S2.3. Move and adjust the cable crane to the cable drive wire rope that needs maintenance until the bow-shaped shackle B of the load-bearing rope, safety rope and traction rope can be moved to the second lifting pulley platform and buckled with the corresponding rotating lifting ring of the box-shaped column cantilever at the second lifting pulley platform, so that the load-bearing rope, safety rope and traction rope are buckled by the first lifting pulley platform and the second lifting pulley platform respectively.

[0018] Further, step S3 includes:

[0019] S3.1. Start the cable crane in the opposite direction and move it along the ring beam until the load-bearing rope is parallel to the side of the lifting pulley platform at the position of the second lifting pulley platform and stops;

[0020] S3.2, when the rope system forms a certain angle with the bow shackle A and the force is small, the bow shackle A of the load rope, safety rope and traction rope buckled on the cantilever rotating ring of the box column of the first lifting pulley platform are respectively unfastened;

[0021] S3.3. Move the bow-shaped shackle A of the load-bearing rope, safety rope and traction rope to the second lifting pulley platform, and buckle them with the corresponding rotating lifting ring of the box-shaped column cantilever at the second lifting pulley platform, so as to realize the conversion of the load-bearing rope, safety rope and traction rope from being buckled together by the first lifting pulley platform and the second lifting pulley platform to being buckled separately by the second lifting pulley platform.

[0022] Further, step S4 includes:

[0023] S4.1. The cable crane moves in the positive direction along the ring beam until the load-bearing rope is parallel to the steel wire rope of the feed cabin of the second lifting pulley platform and stops;

[0024] S4.2. Complete the pulley maintenance of the two feed cabin steel ropes at the second lifting pulley platform.

[0025] Further, step S1.1 includes:

[0026] S1.1.1. Control the feed cabin to descend to the feed cabin docking platform located at the center of the reflective surface, and relax the steel wire rope of the feed cabin to the minimum rope tension state so that the cable is close to the upper surface of the reflective surface;

[0027] S1.1.2. Determine the position of the wire rope corresponding to the pulley that needs maintenance, control the cable crane to move along the ring beam to the position corresponding to the wire rope that needs maintenance, and the upper anchor end of the cableway moves with the cable crane;

[0028] S1.1.3. Determine the lifting pulley platform corresponding to the wire rope where the pulley that needs maintenance is located, switch the lower anchor end of the cableway to the corresponding lifting pulley platform, and ensure that the cableway moves vertically to the top of the wire rope that needs maintenance;

[0029] S1.1.4. Control the ropeway basket to move along the ropeway to the vicinity of the pulley that needs maintenance and carry out maintenance work.

[0030] On the other hand, the present invention provides a lateral movement device for a cage cable used for high-altitude inspection and maintenance of a FAST cable-driven pulley, the device being used to realize a lateral movement method of the cage cable, the device comprising a cableway and a hanging basket, a cable crane, and a lifting pulley platform, a double-limb suppression rigging being provided at the lower anchor end of the cableway, the double-limb suppression rigging comprising a bow-shaped shackle A and a bow-shaped shackle B.

[0031] Furthermore, three lifting pulley platforms are arranged around the feed cabin docking platform at positions corresponding to the wire rope connection points, with an angle of 120 degrees between each lifting pulley platform. The load-bearing rope, traction rope and safety rope of the cableway are all detachably connected to the cantilever of the lifting pulley platform through the rotating hook of the double-limb pressing rigging.

[0032] Furthermore, when switching the lifting pulley platform, first retract the hanging basket to the mobile cable lowering platform, and use the winch to relax the load rope, safety rope and traction rope of the cableway to a position as close to the reflecting surface as possible.

[0033] Furthermore, when the cableway is switched from one lifting pulley platform to another, the bow-shaped shackle A of the load-bearing rope, traction rope and safety rope is firstly untied from one lifting pulley platform and connected to another lifting pulley platform, the cable hoist position is controlled by moving, and then the bow-shaped shackle B of the load-bearing rope, traction rope and safety rope is untied and connected to another platform, so that the lower anchoring end of the entire cableway is switched from one platform to another. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 The schematic diagram of the structure of the reflector system of FAST is shown;

[0035] Figure 2 The schematic diagram of the structure of the feed support system of FAST is shown;

[0036] Figure 3 A schematic diagram of the side structure of FAST is shown;

[0037] Figure 4 A schematic diagram of a use scenario of a high-altitude inspection and maintenance method for a FAST cable-driven pulley based on a cage cable is shown;

[0038] Figure 5 A schematic diagram of the cable crane structure is shown;

[0039] Figure 6 Shows a schematic diagram of the lifting pulley platform structure;

[0040] Figure 7 A schematic diagram of the cableway basket structure is shown;

[0041] Figure 8 A schematic diagram of a rope connection structure is shown;

[0042] Fig. 9 A schematic diagram of the double-limb suppression rigging structure is shown;

[0043] Fig.10 A schematic diagram showing the process of switching between three lifting pulley platforms;

[0044] Fig.11 Shows Fig.10 A partial enlarged schematic diagram of . DETAILED DESCRIPTION

[0045] 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.

[0046] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0047] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0048] The following combination Figure 1-Figure 11 The specific embodiments of the present invention are described in detail. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0049] like Figure 1-3 As shown, the FAST telescope includes several major process systems such as the active reflector system 100 and the feed support system 200. The active reflector system 100 is used to detect and collect cosmic astronomical signals, and the feed support system 200 is used to focus the signals collected by the reflector system to achieve tracking of astronomical trajectories and preliminary positioning of the feed receiver in the cabin. The feed support system 200 is arranged above the reflector system 100.

[0050] like Figure 1 As shown, the active reflector system 100 includes a plurality of reflector units ( Figure 2 The spherical main cable net 101 supporting several reflective surface units, the ring beam 102 as the main cable net support structure, the lower cable 103 providing tension for the main cable net, and the feed cabin docking platform 104 located at the center of the main cable net. Several reflective surface units form a parabolic shape suitable for observation according to the observed object.

[0051] like Figure 2 and 3As shown, the feed support system 200 includes a feed cabin 201, a plurality of support towers 202 arranged on the periphery of the ring beam 102, and a wire rope 203 arranged between the support tower 202 and the feed cabin 201, a winch drive mechanism and a control center for controlling the wire rope. The feed cabin 201 is at the focal position of the parabola, and is used to focus the signal collected by the reflector system. Due to the deformation of the reflector in the observation of celestial body motion, the shape of the parabola and the change of the focal position will be brought about. Therefore, the feed cabin 201 also needs to be controlled to move to the corresponding position by each wire rope. For this reason, one end of each wire rope 203 is connected to the feed cabin 201, and the other end is connected to the winch drive mechanism at the bottom of the support tower 202 through the top pulley of the support tower 202, and the winch drive mechanism realizes the retraction and release operation of the wire rope. The control center realizes the precise control of the position of the feed cabin 201 by controlling multiple wire ropes. In the non-use state or maintenance state, the feed cabin 201 can be controlled to dock on the port entry platform 104. In the specific embodiment, a total of 6 feed support towers are set up, corresponding to 6 steel wire ropes. In order to achieve precise control, the control center also includes a total station, GPS, wind and temperature sensors, on-site monitoring devices, model solving devices, tension meters, tower top encoders, servo motor encoders, drum encoders and six-cable synchronous motion controllers.

[0052] By controlling the retraction and extension of 6 steel wires, the feed cabin weighing 30 tons is pulled in parallel to move at an altitude of about 140 meters and within a range of about 200 meters. A number of pulleys 204 are hung on each steel wire. The pulleys are used to hang cables and optical cables as channels for power supply and signal transmission of equipment in the feed cabin. Adjacent pulleys are connected by double stainless steel traction steel wires to pull each other to prevent the cables or optical cables from being stressed.

[0053] In order to realize the high-altitude inspection and maintenance of the pulley on the wire rope, the present invention provides a method and device for lateral movement of a cage rope (cage is a hanging basket, cage rope is also referred to as cableway) for high-altitude inspection and maintenance of FAST cable-driven pulley. Through this method, maintenance personnel can be directly transported to the position of the pulley that needs inspection and maintenance, thereby avoiding the technical problems in the prior art that maintenance personnel need to climb to the top of the supporting tower and rely on straddling on the traction rope to move slowly to approach the position of the pulley that needs maintenance, which has a high risk factor and a long maintenance time due to the difficulty of moving.

[0054] Among them, Figure 4 As shown, the hardware equipment used in the method includes a cable crane 300, a cableway basket 400 and a lifting pulley platform 500; the high-altitude maintenance of the pulleys on the six cable-driven steel wire ropes is performed through a radial half-span cable basket system. The newly built cage cable support structure for the inspection and maintenance of the cable-driven pulley is comprehensively considered with the original structure to avoid interference with the original structure, and at the same time facilitates switching between the three lifting pulley platforms.

[0055] The FAST reflector system is provided with a ring beam 102 as a peripheral support structure of the spherical main cable net. The ring beam 102 has an inner ring beam and an outer ring beam at the top. The cable crane 300 is slidably arranged on the ring beam 102 and can move along the ring beam 102 to any position of the ring beam. Figure 5 As shown, the cable crane 300 includes a running mechanism, a supporting structure and an actuator. The running mechanism is used to drive the cable crane to run in a circular direction along the track on the upper surface of the ring beam, and the motor drives each running wheel group of the running mechanism to run forward or backward. A braking device is also provided on the running mechanism.

[0056] The supporting structure is arranged on the traveling mechanism, and the supporting structure includes a column 307, an inclined support frame 308 and a bracket 309. A cab 311 is arranged on one side of the inclined support frame 308, and the cable crane 300 is operated in the cab. The upper anchor end of the cableway moves with the cable crane. The upper ends of the load rope, safety rope and traction rope of the pulley maintenance basket are all connected to the top of the tower of the cable crane moving on the ring beam, and the connection method is to directly use the wire rope fixed in the braking state of the winch.

[0057] A tension winch 311 and a traction winch 312 are provided on the winch bracket 310. The tension winch 311 is used to control the tension and relaxation of the load-bearing rope 313 forming the cableway, and the load-bearing rope 313 is connected to the tension winch 311 through a first guide pulley provided on the winch bracket 310 to form an upper anchoring end of the cableway; the traction winch 312 is used to control the tension and relaxation of the traction rope 314, and the traction rope 314 is connected to the traction winch 312 through a second guide pulley provided on the winch bracket 310.

[0058] In addition, the cable crane 300 also includes a generator set for supplying power to the inspection and maintenance device. When power is supplied by cable, a cable drum, a hydraulic station and an electrical control system are also provided.

[0059] like Figure 6 As shown, the lifting pulley platform 500 is arranged on the feed cabin docking platform 104 through a box-type column, and three lifting pulley platforms 500 are arranged correspondingly based on the connection position of the wire rope and the feed cabin, respectively referred to as the first lifting pulley platform, the second lifting pulley platform and the third lifting pulley platform. The upper surface of each lifting pulley platform 500 serves as the lower anchor end of the radial half-span cable crane ropeway. A cantilever is provided on the lifting pulley platform 500, and a rotating ring is provided on the cantilever, and the load-bearing rope of the ropeway is connected to the rotating ring.

[0060] In order to facilitate the conversion, the box column at the lower end and its position are optimized and adjusted: the lower end of the cableway is connected to the rotating ring of the box column cantilever in the middle of the large roller of the cabin cable anchor point. The connection method is to press an embedded heart ring on the wire rope head to form a heart ring wire rope head, such as Figure 8As shown, after the double-limb pressing rigging is connected to the wire rope head, the rotating hook of the double-limb pressing rigging is connected to the rotating lifting ring. Fig. 9 As shown, the rope ends of the load rope, the safety rope and the traction rope all adopt double-limb pressing rigging, and each double-limb pressing rigging includes two bow shackles, namely bow shackle A and bow shackle B.

[0061] Specifically, one end of the cableway's carrying rope 313 is connected to a higher-positioned cable crane 300, and the other end is connected to a lower-positioned lifting pulley platform 500. The cableway basket 400 is suspended on the carrying rope 313. Maintenance personnel can ride on the cableway basket 400 and move along the carrying rope 313 to the pulley position that needs maintenance to perform maintenance.

[0062] like Figure 7 As shown, the cableway basket 400 includes a basket body 401, an oblique lifting mechanism 403, a vertical lifting mechanism 402 and a control electric box 405; the oblique lifting mechanism 403 is used to drive the cableway basket 400 to move on the load-bearing rope 313 in the oblique direction through the oblique lifting traction rope 404; the vertical lifting mechanism 402 is used to control the lifting and lowering of the basket body 401 in the vertical direction. In addition, the cableway basket 400 also includes a worker safety rope, a safety lock and a rope retractor. The oblique lifting mechanism uses a rope winding mechanism with heavy weight but large friction lifting force, and the vertical hoists fixed at both ends of the basket body 401 use an "α" type rope winding mechanism with light weight and slightly small friction force.

[0063] For this reason, Fig.10 and 11 As shown, the conversion method for inspection and maintenance of FAST adjacent cable drive pulleys according to the present invention includes the following steps:

[0064] Step S1. Fix the lower anchorage end of the cableway to the corresponding box-type column end on the first lifting platform through the bow shackle A and bow shackle B of the double-limb pressing rigging. At this time, the lower anchorage end of the cableway is a single-platform double-point connection, and then operate the cable crane to travel along the ring beam to the corresponding position of the wire rope that needs maintenance; the maintenance personnel control the cableway basket in the basket to move along the cableway to approach the pulley that needs maintenance, and complete the maintenance work of the pulley on the current wire rope; Step S2. After completing the inspection and repair work of the pulley on the current wire rope, retract the basket to the cable platform, and convert the single-platform double-point connection of the anchorage point of the lower end of the cableway into a double-platform single-point connection, that is, keep the bow shackle A on the first platform; move the bow shackle B of the double-limb pressing rigging at the lower anchorage end of the cableway to the second lifting pulley platform;

[0065] Step S3. Convert the double-platform single-point connection of the lower anchor point of the cableway into a single-platform single-point connection;

[0066] Step S4: Transfer to the wire rope position for maintenance.

[0067] Specifically, step S1 includes:

[0068] S1.1. Move the cable crane along the ring beam to a position close to the wire rope pulley, adjust the verticality of the load rope, safety rope and traction rope to meet the maintenance conditions, and then gradually lower the basket from the cable lowering platform to the position of the wire rope pulley that needs maintenance. Then adjust the hoist obliquely and move the cableway basket up and down to approach the wire rope pulley for inspection and maintenance, so as to complete the pulley maintenance of a feed cabin wire rope at the first lifting platform.

[0069] S1.2. When it is necessary to move to the next wire rope position, the hanging basket needs to be recovered to the platform under the cable hoist, and then the load-bearing rope, safety rope and traction rope of the maintenance system need to be relaxed to a position as close to the reflection surface as possible, and the load-bearing rope, safety rope and traction rope need to be prepared to move with the cable hoist.

[0070] Step S2 includes:

[0071] S2.1, start the cable crane and move it along the ring beam in the circumferential direction until it stops at a position where the load-bearing rope is parallel to the long side of the first lifting pulley platform;

[0072] S2.2. Unfasten the bow-shaped shackle B of the double-limb pressing rigging of the load rope, safety rope and traction rope buckled on the cantilever rotating lifting ring of the box-shaped column of the first lifting pulley platform;

[0073] S2.3. Operate the cable crane to move the second cable-driven wire rope that needs maintenance, move the bow-shaped shackles B of the load-bearing rope, safety rope and traction rope to the second lifting pulley platform, and buckle them with the corresponding rotating lifting rings of the box-shaped column cantilever at the second lifting pulley platform, so that the load-bearing rope, safety rope and traction rope are buckled together by the first lifting pulley platform and the second lifting pulley platform respectively.

[0074] Step S3 includes:

[0075] S3.1. Start the cable crane in the opposite direction and move it along the ring beam until the load-bearing rope is parallel to the side of the lifting pulley platform at the position of the second lifting pulley platform and stop until the force on the rope system and the bow shackle A is small;

[0076] S3.2. Unfasten the bow-shaped shackles A of the load rope, safety rope and traction rope respectively which are fastened to the cantilever rotating lifting ring of the box-shaped column of the first lifting pulley platform;

[0077] S3.3. Move the bow-shaped shackle A of the load-bearing rope, safety rope and traction rope to the second lifting pulley platform, and buckle them with the corresponding rotating lifting ring of the box-shaped column cantilever at the second lifting pulley platform, so as to realize the conversion of the load-bearing rope, safety rope and traction rope from being buckled together by the first lifting pulley platform and the second lifting pulley platform to being buckled separately by the second lifting pulley platform.

[0078] Step S4 includes:

[0079] S4.1. The cable crane moves in the positive direction along the ring beam until the load-bearing rope is parallel to the steel wire rope of the feed cabin of the second lifting pulley platform and stops;

[0080] S4.2. Complete the pulley maintenance of the two feed cabin steel ropes at the second lifting pulley platform.

[0081] Step S1.1 further includes:

[0082] S1.1.1. Control the feed cabin to descend to the feed cabin docking platform located at the center of the reflective surface, and relax the steel wire rope of the feed cabin to the minimum rope tension state so that the cable is close to the upper surface of the reflective surface;

[0083] S1.1.2. Determine the position of the wire rope corresponding to the pulley that needs maintenance, control the cable crane to move along the ring beam to the position corresponding to the wire rope that needs maintenance, and the upper anchor end of the cableway moves with the cable crane;

[0084] S1.1.3. Determine the lifting pulley platform corresponding to the wire rope where the pulley that needs maintenance is located, switch the lower anchor end of the cableway to the corresponding lifting pulley platform, and ensure that the cableway moves vertically to the top of the wire rope that needs maintenance;

[0085] S1.1.4. Control the ropeway basket to move along the ropeway to the vicinity of the pulley that needs maintenance and carry out maintenance work.

[0086] On the other hand, the present invention provides a conversion device for the inspection and maintenance of adjacent cable-driven pulleys of FAST, the device is used to implement the conversion method for the inspection and maintenance of adjacent cable-driven pulleys of FAST of the present invention, the device includes a cable crane, a lifting pulley platform, a cableway and a cableway basket, wherein the cable crane is located on a ring beam and can move along the ring beam, the lifting pulley platform is located on a feed cabin docking platform, the cableway is arranged between the cable crane and the lifting pulley platform, and the cableway basket can run along the cableway.

[0087] When switching the lifting pulley platform, first retract the hanging basket to the cable hoist, and use the winch to relax the load rope, safety rope and traction rope of the cableway to a position as close to the reflection surface as possible.

[0088] The operation process of the cableway basket is as follows: first, the controller inside the cableway basket controls the oblique lifting mechanism, so that the cableway basket runs along the cableway's load-bearing rope toward the pulley that needs maintenance; when it runs close to the pulley that needs maintenance, the vertical lifting mechanism is controlled to further approach the pulley that needs maintenance in the vertical direction to carry out maintenance operations. When the cable crane moves on the ring beam, the tensioning winch synchronously controls the tightening and loosening of the load-bearing rope.

[0089] Three lifting pulley platforms are set up on the docking platform of the feed cabin at positions corresponding to the connection points of the wire ropes. The angle between each lifting pulley platform is 120 degrees. The load rope, traction rope and safety rope of the supporting basket are all detachably connected to the cantilever of the lifting pulley platform through the rotating hook of the double-limb pressing rigging. The double-limb pressing rigging includes two bow-shaped shackles, called bow-shaped shackle A and bow-shaped shackle B. When the cableway needs to be switched from one lifting pulley platform to another, the bow-shaped shackle A of the load rope, traction rope and safety rope is first untied from one lifting pulley platform and connected to another lifting pulley platform, and then the bow-shaped shackle B of the load rope, traction rope and safety rope is untied and connected to another platform, so that the lower anchor end of the entire cableway can be switched from one platform to another.

[0090] During the maintenance process, the cable crane is moved to a position parallel to the feed cabin cable, the verticality of the load-bearing rope, safety rope, and traction rope is adjusted (satisfactory for the installation of the hanging basket equipment), the hanging basket equipment is suspended, the verticality of the load-bearing rope, safety rope, and traction rope is adjusted (verticality f0 = 19m), and the verticality of the feed cabin cable at the lifting pulley platform 1 is completed by moving the hanging basket obliquely and up and down by the hoist. The controller in the cableway basket first controls the oblique lifting mechanism so that the cableway basket runs along the load-bearing rope toward the pulley that needs maintenance; when it runs close to the pulley that needs maintenance, the vertical lifting mechanism is controlled to further approach the pulley that needs maintenance in the vertical direction.

[0091] In the port entry condition, the six supporting steel wire ropes of the feed cabin are all suspended with cables and curtain mechanisms. Each steel wire rope is divided into three sections: the front section, the middle section and the end section; the front section is the first 96.5m steel wire rope section starting from the anchor point on the cabin cable, which is used to suspend the fixed pulley and the mid-length pulley, and the cable is directly fixed on the steel wire rope; the middle section is the ordinary pulley accumulation section. Under the maximum cable force in the port, there are about 5 ordinary pulleys, and the distance between adjacent pulleys (middle to middle) is 0.66m to ensure the minimum bending radius of the cable. After the pulleys are accumulated, the cables suspended between adjacent ordinary pulleys reach the maximum verticality, and the verticality from the lowest end of the cable to the steel wire rope is 2.85m. The end section is the ordinary pulley deployment section, with a distance between adjacent ordinary pulleys (middle to middle) of 5m, and the number of its pulleys is 60. .

[0092] The upper ends of the load rope, safety rope and traction rope of the cableway basket are connected to the top of the cable crane moving on the ring beam evenly around the circumference. The connection method is to directly use the winch to fix the wire rope in the braking state. The lower end is connected to the three rollers on the top of the newly designed box-type column on the side of the large roller at the cabin cable anchor point. The connection method is to press and embed a heart ring on the wire rope head to form a heart ring wire rope head.

[0093] The driving mode of the hanging basket: lithium battery powered, low cost, convenient and flexible, easy to disassemble, charge and maintain.

[0094] The maintenance basket is located on the cable hanging platform and is in a relaxed state. The cables and their mounted pulleys are in a retracted state. There is no load on the load-bearing cables and the maintenance system is in a no-load state. According to calculation and analysis, when the mid-span deflection is 19m, it can be guaranteed that the load-bearing cables have sufficient safety margin during use.

[0095] Figure 3 The diagram of the position of the load-bearing cable under the no-load condition of the cable-driven pulley high-altitude maintenance system. At this time, the maintenance basket is located on the cable platform and is in a relaxed state. The cables and their mounted pulleys are in a retracted state. There is no load on the load-bearing cable, and the maintenance system is in an unloaded state. According to calculation and analysis, when the mid-span deflection is 19m, it can be guaranteed that the load-bearing cable has sufficient safety margin during use.

[0096] Figure 4 This is a schematic diagram of the position relationship of the load-bearing cable, cabin cable, and reflective surface under the mid-span fully loaded working condition of the cable-driven pulley high-altitude maintenance system. At this time, the maintenance basket is fully loaded and located at the mid-span position of the load-bearing cable of the maintenance system. The cables near the basket and their mounted small pulleys are in a tightened state, and the cables and their mounted small pulleys in the distance are in a relaxed state. The load-bearing cable is located near the anchor point at one end of the cable hanger, and a cable tightening device is arranged to ensure the tightening state of the cable. The position relationship of each cable in the figure is calculated according to the load state at this time.

[0097] The Φ28mm load-bearing steel wire rope of the original cable crane under half-span conditions is used as the suspension mechanism of the pulley maintenance basket. The double-person hanging basket has two suspension points connected by a connecting rod. A double roller pulley is set on each suspension point and suspended on the load-bearing steel wire rope. It can be lifted up and down with a large slope using a galvanized steel wire rope traction rope for the hanging basket on the catenary-shaped cable crane load-bearing steel wire rope. The inclined climbing hoist uses a rope winding mechanism with heavy weight but large friction lifting force. The vertical hoist fixed at both ends of the double-person hanging basket uses an "α" type rope winding mechanism with light weight and slightly small friction force.

[0098] The load-bearing rope is a main cable of the original cable crane trolley, which is connected to a winch fixed in the cockpit through a guide wheel at the top of the tower of the cable crane trolley, and then the wire rope is fixed by utilizing the braking state of the winch.

[0099] The safety rope uses the traction rope on the original cable crane trolley, and is connected to the traction winch fixed in the cockpit through the guide wheel at the top of the tower of the cable crane trolley, and then the braking state of the traction winch is used to fix the wire rope.

[0100] A guide pulley is added to the cable crane trolley frame, and the traction rope is pulled to the cable crane through the guide pulley. A traction winch is added to the cable crane, and the traction wire rope is fixed by utilizing the braking state of the traction winch.

[0101] The cable anchor point can be rotated 360° in the plane and 180° in the vertical direction by installing a rotating ring.

[0102] When the power unit of the cableway basket fails and cannot move autonomously, the traction rope is connected to the load-bearing wire rope with a shackle, and then the connection between the climbing wire rope and the rotating lifting ring of the box column is untied, and the basket is pulled up to the cable crane by the additional traction rope winch. This can solve the technical problem of being able to safely transport the cableway basket to the platform under the cable when the power unit of the cableway basket fails and cannot move autonomously.

[0103] Under the action of wind load horizontal force, the load rope, traction rope and safety rope have large lateral displacement (displacement value 10.11~13.31m) because there is no lateral constraint in the rope span. In order to avoid interference with the feed cabin cable, when unloaded, the cable crane should be parked between the two feed cabin cables of one of the movable lifting pulley platforms.

[0104] Any process or method description in the flowchart of the present invention or described in other ways herein can be understood as a module, segment or part of a code including one or more executable instructions for implementing the steps of a specific logical function or process, which can be implemented in any computer-readable medium for use by an instruction execution system, device or equipment, and the computer-readable medium can be any medium containing storage, communication, propagation or transmission programs for use by execution systems, devices or equipment, including read-only memories, magnetic disks or optical disks, etc.

[0105] In the description of this specification, the description with reference to the terms "embodiment", "example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. In addition, those skilled in the art can combine or combine different embodiments or examples described in this specification and the features therein without causing any contradiction.

[0106] Although the above content has shown and described the embodiments of the present invention, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace, modify and other update operations on the above embodiments within the scope of the present invention.

Claims

1. A method for lateral movement of a cage cable for high-altitude inspection and maintenance of a FAST cable-driven pulley, which is applied to a FAST telescope with a reflecting surface system and a feed support system; in the feed support system, six supporting towers lead out six steel wires to pull and control the feed cabin to move on the focal plane of the telescope to cooperate with astronomical observations, and a number of pulleys for hanging cables and optical cables are arranged on each steel wire, a feed cabin docking platform is arranged at the center of the reflecting surface, and a ring beam is arranged around the reflecting surface; three lifting pulley platforms are evenly arranged around the feed cabin docking platform, namely the first lifting pulley platform, the second lifting pulley platform and the third lifting pulley platform, and a cable crane capable of circumferential movement is arranged on the top of the ring beam; a cableway is arranged between the lifting pulley platform and the cable crane, and the cableway basket is controlled to carry personnel and move along the cableway to the vicinity of the pulley that needs maintenance to carry out maintenance operations; it is characterized in that The method comprises the following steps: Step S1. The lower anchor end of the cableway is fixed to the box-type column end on the corresponding first lifting pulley platform through the bow shackle A and the bow shackle B of the double-limb pressing rigging. At this time, the lower anchor end of the cableway is a single platform double-point connection, and then the cable crane is operated to travel along the ring beam to the corresponding position of the wire rope that needs maintenance; the maintenance personnel control the cableway basket in the basket to move along the cableway close to the pulley that needs maintenance, and complete the maintenance work of the pulley on the current wire rope; Step S2. After completing the inspection and repair work of the pulley on the current wire rope, retract the hanging basket to the cable lower platform, convert the single-platform double-point connection of the anchor point at the lower end of the cableway into a double-platform single-point connection, keep the bow shackle A on the first platform, and move the bow shackle B of the double-limb pressing rigging at the lower anchor end of the cableway to the second lifting pulley platform; Step S3. Convert the double-platform single-point connection of the lower anchor point of the cableway into a single-platform single-point connection; Step S4: Transfer to the wire rope position for maintenance.

2. The method for lateral movement of the cage cable for high-altitude inspection and maintenance of the FAST cable-driven pulley according to claim 1 is characterized in that: Step S1 includes: S1.

1. Move the cable crane along the ring beam to a position close to the wire rope pulley, adjust the verticality of the load rope, safety rope, and traction rope to meet the maintenance conditions, and then gradually lower the basket from the cable lowering platform to the position of the wire rope pulley that needs maintenance. Then adjust the hoist obliquely and move the cableway basket up and down to the wire rope pulley for inspection and maintenance, so as to complete the pulley maintenance of a feed cabin wire rope at the first lifting pulley platform; S1.

2. Loosen the load-bearing rope, safety rope and traction rope of the maintenance system as close to the reflecting surface as possible, and prepare the load-bearing rope, safety rope and traction rope to move with the cable crane.

3. The method for lateral movement of the cage cable for high-altitude inspection and maintenance of the FAST cable-driven pulley according to claim 2 is characterized in that: Step S2 includes: S2.1, start the cable crane and move it along the ring beam in the circumferential direction until it stops at a position where the load-bearing rope is parallel to the long side of the first lifting pulley platform; S2.

2. Unfasten the bow-shaped shackle B of the double-limb pressing rigging of the load rope, safety rope and traction rope buckled on the cantilever rotating lifting ring of the box-shaped column of the first lifting pulley platform; S2.

3. Move the bow-shaped shackles B of the load-bearing rope, the safety rope and the traction rope to the second lifting pulley platform, and buckle them with the corresponding rotating lifting rings of the box-shaped column cantilever at the second lifting pulley platform, so that the load-bearing rope, the safety rope and the traction rope are buckled together by the first lifting pulley platform and the second lifting pulley platform respectively.

4. The method for lateral movement of the cage cable for high-altitude inspection and maintenance of the FAST cable-driven pulley according to claim 3 is characterized in that: Step S3 includes: S3.

1. Start the cable crane in the opposite direction and move it along the ring beam until the load-bearing rope is parallel to the side of the lifting pulley platform at the position of the second lifting pulley platform and stops; S3.

2. When the rope system and the shackle B rope are in a straight line and the shackle A rope is loosened, the bow shackle A of the load rope, safety rope and traction rope buckled on the cantilever rotating ring of the box column of the first lifting pulley platform are respectively unfastened; S3.

3. Move the bow-shaped shackle A of the load-bearing rope, safety rope and traction rope to the second lifting pulley platform, and buckle them with the corresponding rotating lifting ring of the box-shaped column cantilever at the second lifting pulley platform, so as to realize the conversion of the load-bearing rope, safety rope and traction rope from being buckled together by the first lifting pulley platform and the second lifting pulley platform to being buckled separately by the second lifting pulley platform.

5. The method for lateral movement of the cage cable for high-altitude inspection and maintenance of the FAST cable-driven pulley according to claim 4 is characterized in that: Step S4 includes: S4.

1. The cable crane moves in the positive direction along the ring beam until the load-bearing rope is parallel to the steel wire rope of the feed cabin of the second lifting pulley platform and stops; S4.

2. Complete the pulley maintenance of the cable-driven wire rope at the second lifting pulley platform.

6. The method for lateral movement of the cage cable for high-altitude inspection and maintenance of the FAST cable-driven pulley according to claim 2, characterized in that: Step S1.1 includes: S1.1.

1. Control the feed cabin to descend to the feed cabin docking platform located at the center of the reflective surface, and relax the steel wire rope of the feed cabin to the minimum rope tension state so that the cable is close to the upper surface of the reflective surface; S1.1.

2. Determine the position of the wire rope corresponding to the pulley that needs maintenance, control the cable crane to move along the ring beam to the position corresponding to the wire rope that needs maintenance, and the upper anchor end of the cableway moves with the cable crane; S1.1.

3. Determine the lifting pulley platform corresponding to the wire rope where the pulley that needs maintenance is located, switch the lower anchor end of the cableway to the corresponding lifting pulley platform, and ensure that the cableway moves vertically to the top of the wire rope that needs maintenance; S1.1.

4. Control the ropeway basket to move along the ropeway to the vicinity of the pulley that needs maintenance and carry out maintenance work.

7. A device for lateral movement of a cage rope for high-altitude inspection and maintenance of a FAST cable-driven pulley, the device being used to implement a method for lateral movement of a cage rope for high-altitude inspection and maintenance of a FAST cable-driven pulley according to any one of claims 1 to 6, characterized in that: The device comprises a cableway, a cable crane and a lifting pulley platform. A double-limb pressing rigging is arranged at the lower anchoring end of the cableway. The double-limb pressing rigging comprises a bow shackle A and a bow shackle B.

8. The cage cable lateral movement device for high-altitude inspection and maintenance of a FAST cable-driven pulley according to claim 7 is characterized in that: Three lifting pulley platforms are arranged on the feed cabin docking platform at positions corresponding to the connection points of the wire ropes, with an angle of 120 degrees between each lifting pulley platform. The load-bearing rope, traction rope and safety rope of the cableway are all connected to the box-type column cantilever of the lifting pulley platform in a detachable manner through the rotating hook of the double-limb pressing rigging.

9. The cage cable lateral movement device for high-altitude inspection and maintenance of a FAST cable-driven pulley according to claim 8, characterized in that: When switching the lifting pulley platform, first retract the hanging basket to the cable lowering platform, and use the winch to relax the load rope, safety rope and traction rope of the cableway to a position close to the reflecting surface.

10. The cage cable lateral movement device for high-altitude inspection and maintenance of a FAST cable-driven pulley according to claim 7, characterized in that: When switching the cableway from one lifting pulley platform to another, first unfasten the bow-shaped shackle A of the load-bearing rope, traction rope and safety rope from one lifting pulley platform and connect them to another lifting pulley platform, adjust the cable hanger by forward and reverse movement, then unfasten the bow-shaped shackle B of the load-bearing rope, traction rope and safety rope and connect them to another platform, so as to switch the lower anchor end of the entire cableway from one platform to another.

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