A FAST reflector unit adaptive connection mechanism replacement force system conversion tool

Abstract

The present invention relates to the technical field of FAST radio astronomical telescope, and in particular to a FAST reflector unit adaptive connection mechanism replacement force conversion tooling. The tooling includes: a main cable anchor head lower clamping tile, a main cable anchor head clamping tile, a main cable anchor head rubber pad, an upper chord rod lower clamping tile, an upper chord rod upper clamping tile, an upper chord rod rubber pad, an upper chord rod connection steel plate, a reflector support channel steel, a reflector support column inner conical seat, a reflector support nut and a reflector support column, and a tensioning mechanism; the FAST reflector unit adaptive connection mechanism replacement force conversion tooling provided by the present invention can assist in the replacement of the reflector unit adaptive connection mechanism, has little influence on the original structure stress, realizes the rapid replacement of the adaptive connection mechanism, has low manual labor intensity, fast progress, no damage to the original reflector unit, and meets the needs of reflector unit maintenance.

Description

Technical Field

[0001] The invention relates to the technical field of a FAST radio astronomical telescope, and in particular to a force system conversion tool for replacing an adaptive connection mechanism of a FAST reflector unit. Background Art

[0002] The Five-hundred-meter Aperture Spherical radioTelescope (FAST) is a major scientific facility built during my country's 11th Five-Year Plan period. It is the world's largest single-aperture radio astronomical telescope and features three independent innovations: using Guizhou's natural karst depression as the site, an actively deformable reflecting surface, and a flexible lightweight feed support that is dragged by six cables in parallel.

[0003] The FAST reflector uses a flexible cable net as the main supporting structure and key component of active deformation. The cable net structure includes 6,670 main cables, 2,225 lower cables and 2,225 cable net node plates. Each lower cable is connected to a hydraulic actuator and anchored to the ground pier. Each node plate is connected to the six adjacent main cables, which together form a huge main cable net, which is also the basis of the geometric shape of the FAST reflector. By coordinating and controlling the telescopic movement of 2,225 hydraulic actuators, and then driving the movement of the main cables and node plates, the shape of the reflector can be changed, such as the reference sphere (curvature radius of 300 meters) and the rotating parabola (aperture 300 meters) required for astronomical observations.

[0004] The curved surface domain formed by the main cable net mainly adopts the short-range line segmentation method. The entire domain is divided into 4,300 approximately equilateral triangle domains and 150 edge quadrilateral domains, and each node disk is located at the vertex position of these triangles and quadrilaterals. Each triangular domain and quadrilateral domain of the main cable net is installed with an all-aluminum alloy reflector unit, covering the entire domain to form the FAST reflector. There is a gap of about 65mm between adjacent reflector units to ensure that adjacent units will not collide and interfere when the reflector surface shape changes. The side length of the triangular unit is about 11 meters and the weight is about 450-480Kg. Each vertex of the reflector unit is constrained and connected to its corresponding cable net node disk through an adaptive connection mechanism. For the triangular unit, different vertices are connected to different adaptive connection mechanisms, which can be divided into three types: 0# connection mechanism, 1# connection mechanism and 2# connection mechanism. The 0# connection mechanism constrains 3 translational degrees of freedom, the 1# connection mechanism constrains 2 translational degrees of freedom, and the 2# connection mechanism constrains 1 translational degree of freedom. The six degrees of freedom of the rigid reflective surface unit are constrained by such a constrained connection method, thereby ensuring that the reflective surface unit is connected to the cable net structure in a simply supported manner, and no additional internal force is caused by the movement and deformation of the cable net structure itself.

[0005] The adaptive connection mechanism of the FAST reflector unit is a completely innovative product. There is no ready-made example for reference. It is necessary to continuously improve the original product design and installation process in the cycle of failure-improvement-update. The lubrication of the adaptive connection mechanism is very important, but due to long-term exposure to the field environment, as the working time increases, the lubrication performance deteriorates and may even fail, resulting in the adaptive connection mechanism being unable to eliminate the relative position change of the reflector when it is actively deformed through internal sliding, thereby endangering the reflector unit.

[0006] Because the faulty reflective surface units are distributed in a spherical reflective surface with a diameter of 500 meters and an elevation difference of 134 meters, about half of the cable net nodes of the faulty reflective surface units are about 4.3m to 10m above the ground, and the rest are about 10m to 50m above the ground. The maintenance of the faulty units is all high-altitude work, which is difficult for personnel to reach.

[0007] 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

[0008] The purpose of the present invention is to provide a FAST reflective surface unit adaptive connection mechanism replacement force system conversion tooling to solve the technical problems existing in the prior art.

[0009] In order to achieve the above object, the present invention adopts the following technical solutions:

[0010] The present invention provides a FAST reflector unit adaptive connection mechanism replacement force system conversion tool, which comprises: a main cable anchor head lower clamping shoe, a main cable anchor head upper clamping shoe, a main cable anchor head rubber pad, an upper chord rod lower clamping shoe, an upper chord rod upper clamping shoe, an upper chord rod rubber pad, an upper chord rod connecting steel plate, a reflector support channel steel, a reflector support column inner conical seat, a reflector support nut and a reflector support column and a tensioning mechanism;

[0011] The main cable anchor head rubber pads are respectively installed on the first main cable anchor head and the second main cable anchor head, and each main cable anchor head rubber pad is respectively installed with a main cable anchor head lower clamping tile and a main cable anchor head upper clamping tile, and the main cable anchor head lower clamping tile and the main cable anchor head upper clamping tile are fixedly connected;

[0012] The upper chord rod rubber pads are respectively installed on the first upper chord rod and the second upper chord rod, and each of the upper chord rod rubber pads is respectively installed with an upper chord rod lower clamping tile and an upper chord rod upper clamping tile, and the upper chord rod lower clamping tile and the upper chord rod upper clamping tile are fixedly connected;

[0013] The reflective surface support channel steel is installed between the two main cable anchor head clips; the upper chord connecting steel plate is installed between the two upper chord upper clips; the inner conical seat of the reflective surface support column is arranged in the middle of the reflective surface support channel steel; the reflective surface support nut is located on the bottom surface of the upper chord connecting steel plate; the bottom end of the reflective surface support column is successively passed through the long slot hole in the middle of the upper chord connecting steel plate and the reflective surface support nut and then fixed on the inner conical seat of the reflective surface support column;

[0014] One end of the tensioning mechanism is connected to the upper chord connecting steel plate, and the other end of the tensioning mechanism is connected to the bolt ball node connected to the lower part of the web member.

[0015] As a further technical solution, the tensioning mechanism comprises: an eye screw, a wire rope sling, a rigging turnbuckle and a sling;

[0016] The eye screw is installed on the upper chord connecting steel plate;

[0017] The rigging turnbuckle is mounted on the eye screw;

[0018] The wire rope sling is installed on the sling turnbuckle;

[0019] The lower part of the sling is tied to the bolt ball node connected to the lower part of the web, and the upper part of the sling is connected to the wire rope sling.

[0020] As a further technical solution, a stud is provided on the top of the tile clamping on the main cable anchoring head; the reflecting surface supporting channel steel is provided with long slot holes at both ends; the two studs of the tile clamping on the main cable anchoring head are respectively inserted into the long slot holes at both ends of the reflecting surface supporting channel steel, and the reflecting surface supporting channel steel is fastened by installing nuts on the studs of the tile clamping on the main cable anchoring head.

[0021] As a further technical solution, a stud is provided on the top of the upper chord tile; the upper chord connecting steel plate is provided with long slot holes at both ends; the two studs of the upper chord tile are respectively inserted into the long slot holes at both ends of the upper chord connecting steel plate, and the upper chord connecting steel plate is fastened by installing nuts on the studs of the upper chord tile.

[0022] As a further technical solution, a mounting hole is provided in the middle part of the reflecting surface support channel steel; the inner conical seat of the reflecting surface support column is installed in the mounting hole in the middle part of the reflecting surface support channel steel, and the inner conical surface of the inner conical seat of the reflecting surface support column is located above the reflecting surface support channel steel; the spherical surface at the lower end of the reflecting surface support column contacts the inner conical surface of the inner conical seat of the reflecting surface support column, so as to limit the three translational degrees of freedom of the spherical surface at the lower end of the reflecting surface support column.

[0023] As a further technical solution, the cross-section of the reflecting surface support nut is T-shaped; the width of the upper part of the reflecting surface support nut is smaller than the width of the lower part of the reflecting surface support nut; the upper part of the reflecting surface support nut and the middle long slot hole of the upper chord connecting steel plate are clearance fit, which is used to limit the rotational freedom of the reflecting surface support nut around the center line of the thread.

[0024] As a further technical solution, a cross bar is welded to the upper part of the reflective surface support column; the vertical bar of the reflective surface support column is provided with an external thread; and the lower part of the reflective surface support column is provided with a spherical surface.

[0025] As a further technical solution, it also includes: a first traction mechanism and a second traction mechanism;

[0026] One end of the first traction mechanism is connected to the node ball of the first upper chord, and the other end of the first traction mechanism is connected to the third main cable anchor head, and the third main cable anchor head is adjacent to the first main cable anchor head and is located on the same side of the first upper chord;

[0027] One end of the second traction mechanism is connected to the node ball of the second upper chord, and the other end of the second traction mechanism is connected to the fourth main cable anchor head. The fourth main cable anchor head is adjacent to the second main cable anchor head and is located on the same side of the second upper chord.

[0028] As a further technical solution, the first traction mechanism and the second traction mechanism respectively include: a sling and a hand winch; one end of the hand winch is connected to the node ball at the rear end of the first upper chord rod or the second upper chord rod through a sling; the other end of the hand winch is connected to the third main cable anchor head or the fourth main cable anchor head through a sling.

[0029] By adopting the above technical solution, the present invention has the following beneficial effects:

[0030] The FAST reflecting surface unit adaptive connection mechanism replacement force system conversion tooling provided by the present invention can assist in the replacement of the reflecting surface unit adaptive connection mechanism, has little impact on the force of the original structure, realizes rapid replacement of the adaptive connection mechanism, has low manual labor intensity, fast progress, and no damage to the original reflecting surface unit, thus meeting the needs of reflecting surface unit maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] 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.

[0032] Figure 1 A schematic diagram of the assembly of a force conversion tool for replacing the adaptive connection mechanism of a FAST reflector unit provided by an embodiment of the present invention;

[0033] Figure 2 A cross-sectional view of a force system conversion tooling for replacing the adaptive connection mechanism of a FAST reflector unit provided by an embodiment of the present invention;

[0034] Figure 3 A schematic structural diagram of a reflective surface support nut provided in an embodiment of the present invention;

[0035] Figure 4 A schematic diagram of the structure of the clip tile on the main cable anchoring head provided by an embodiment of the present invention;

[0036] Figure 5 A schematic diagram of the structure of the lower clip shoe of the main cable anchoring head provided by an embodiment of the present invention;

[0037] Figure 6 A schematic diagram of the structure of the reflective surface unit provided in an embodiment of the present invention being pulled upward;

[0038] Figure 7 This is a schematic diagram of the disassembly of the 10 1# connection mechanism provided in an embodiment of the present invention, wherein the small reflective panel is folded up;

[0039] Figure 8 A schematic structural diagram of a traction mechanism provided in an embodiment of the present invention.

[0040] Icons: 1—sling; 2—wire rope sling; 3—rigging turnbuckle; 4—reflective surface support channel steel;

[0041] 5—clamping tile below the main cable anchoring head; 6—bolt; 7—nut; 8—clamping tile above the main cable anchoring head;

[0042] 9—main cable anchor head rubber pad; 10—upper chord rod rubber pad; 11—upper chord rod lower clamping tile;

[0043] 12—Wall tile on the upper chord rod; 13—Steel plate connecting the upper chord rod; 14—Support column of the reflective surface;

[0044] 15—reflecting surface support nut; 16—eye screw; 17—conical seat inside the reflecting surface support column;

[0045] 18—cable node plate; 19—reflector unit connection plate; 20—1# connection mechanism;

[0046] 21—first upper chord rod; 22—second upper chord rod; 23—reflector back frame belly rod;

[0047] 24—node ball of the upper chord rod of the reflective surface back frame; 26—screw; 29—shaft sleeve; 30—small reflective panel;

[0048] 31-hand chain hoist; 32-sling; 33-first main cable anchoring head; 34-second main cable anchoring head;

[0049] 35- third main cable anchoring head; 36- fourth main cable anchoring head; 37- first traction mechanism;

[0050] 38- Second traction mechanism. DETAILED DESCRIPTION

[0051] 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.

[0052] 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.

[0053] 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.

[0054] 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.

[0055] Combination Figures 1 to 8As shown, this embodiment provides a FAST reflector unit adaptive connection mechanism replacement force system conversion tooling, which includes: a main cable anchor head lower clamping tile 5, a main cable anchor head upper clamping tile 8, a main cable anchor head rubber pad 9, an upper chord rod lower clamping tile 11, an upper chord rod upper clamping tile 12, an upper chord rod rubber pad 10, an upper chord rod connecting steel plate 13, a reflector support channel steel 4, a reflector support column inner conical seat 17, a reflector support nut 15 and a reflector support column 14 and a tensioning mechanism; the main cable anchor head rubber pad 9 is respectively installed on the first On a main cable anchor head 33 and a second main cable anchor head 34, each of the main cable anchor head rubber pads 9 is respectively installed with a main cable anchor head lower clamping tile 5 and a main cable anchor head upper clamping tile 8, the main cable anchor head lower clamping tile 5 and the main cable anchor head upper clamping tile 8 are fixedly connected (specifically, each pair of main cable anchor head lower clamping tile 5 and the main cable anchor head upper clamping tile 8 are connected with two sets of bolt pairs consisting of bolts 6 and nuts 7); the upper chord rod rubber pads 10 are respectively installed on the first upper chord rod 21 and the second upper chord rod 22, each of the upper chord rods A lower chord tile 11 and an upper chord tile 12 are respectively installed on the rod rubber pad 10, and the lower chord tile 11 and the upper chord tile 12 are fixedly connected (specifically, each pair of lower chord tile 11 and upper chord tile 12 are connected by two sets of bolt pairs consisting of bolts 6 and nuts 7); the reflective surface support channel steel 4 is installed between the two main cable anchor head tiles 8; the upper chord connecting steel plate 13 is installed between the two upper chord tile 12; the inner conical seat of the reflective surface support column 17 is set in the middle of the reflective surface support channel steel 4; the reflective surface support nut 15 is located on the bottom surface of the upper chord connecting steel plate 13; the bottom end of the reflective surface support column 14 is successively passed through the long slot hole in the middle of the upper chord connecting steel plate 13 and the reflective surface support nut 15 and then fixed on the inner conical seat 17 of the reflective surface support column; one end of the tensioning mechanism is connected to the upper chord connecting steel plate 13, and the other end of the tensioning mechanism is connected to the bolt ball node connected to the lower part of the reflective surface back frame belly rod 23. By adjusting the length of the two sets of traction mechanisms, the position of the reflective surface is adjusted.

[0056] In this embodiment, preferably, the tensioning mechanism includes: an eye screw 16, a wire rope sling 2, a rigging turn buckle 3 and a sling 1; the eye screw 16 is installed on the upper chord connecting steel plate 13; the rigging turn buckle 3 is installed on the eye screw 16; the wire rope sling 2 is installed on the rigging turn buckle 3; the lower part of the sling 1 is tied to the bolt ball node connected to the lower part of the belly rod, and the upper part of the sling 1 is connected to the wire rope sling 2.

[0057] In this embodiment, as a further technical solution, a stud is provided on the top of the shoe 8 on the main cable anchor head; the reflecting surface supporting channel steel 4 is provided with long slot holes at both ends; the two studs of the shoe 8 on the main cable anchor head are respectively inserted into the long slot holes at both ends of the reflecting surface supporting channel steel 4, and the reflecting surface supporting channel steel 4 is fastened by installing nuts on the studs of the shoe 8 on the main cable anchor head.

[0058] In this embodiment, as a further technical solution, a stud is provided on the top of the upper chord upper tile 12; the upper chord connecting steel plate 13 is provided with long slot holes at both ends; the two studs of the upper chord upper tile 12 are respectively inserted into the long slot holes at both ends of the upper chord connecting steel plate 13, and the upper chord connecting steel plate 13 is fastened by installing nuts on the studs of the upper chord upper tile 12.

[0059] In this embodiment, as a further technical solution, a mounting hole is provided in the middle part of the reflecting surface support channel steel 4; the inner conical seat 17 of the reflecting surface support column is installed in the mounting hole in the middle part of the reflecting surface support channel steel 4, and the inner conical surface of the inner conical seat 17 of the reflecting surface support column is located above the reflecting surface support channel steel 4; the lower end spherical surface of the reflecting surface support column 14 contacts with the inner conical surface of the inner conical seat 17 of the reflecting surface support column, so as to limit the three translational degrees of freedom of the lower end spherical surface of the reflecting surface support column 14.

[0060] In other words, the inner conical seat 17 of the reflective surface support column and the middle through hole of the reflective surface support channel steel 4 are hole-axis clearance fit, the lower end spherical surface of the reflective surface support column 14 contacts the inner conical surface of the inner conical seat 17 of the reflective surface support column, limiting the three translational degrees of freedom of the lower end spherical surface of the reflective surface support column 14, the reflective surface support nut 15 is a homemade T-shaped nut with a small upper width, and a clearance fit with the middle long slot hole of the upper chord connecting steel plate 13, which plays a role in positioning and limiting the rotational degrees of freedom of the reflective surface support nut 15 around the thread center line, and the lower part of the reflective surface support nut 15 is relatively wide, which plays a supporting role for the upper chord connecting steel plate 13. A horizontal round rod is welded on the upper part of the reflective surface support column 14, which is convenient for manual rotation of the reflective surface support column 14 and flexible adjustment of the support force for the upper chord connecting steel plate 13.

[0061] In this embodiment, as a further technical solution, the cross-section of the reflecting surface support nut 15 is T-shaped; the width of the upper part of the reflecting surface support nut 15 is smaller than the width of the lower part of the reflecting surface support nut 15; the upper part of the reflecting surface support nut 15 and the middle long slot hole of the upper chord connecting steel plate 13 are clearance fit, which is used to limit the rotational freedom of the reflecting surface support nut 15 around the center line of the thread.

[0062] In this embodiment, as a further technical solution, a cross bar is welded to the upper part of the reflective surface support column 14; the vertical rod of the reflective surface support column 14 is provided with an external thread; and the lower part of the reflective surface support column 14 is provided with a spherical surface.

[0063] In this embodiment, as a further technical solution, it further includes: a first traction mechanism 37 and a second traction mechanism 38;

[0064] One end of the first traction mechanism 37 is connected to the node ball of the first upper chord 21 (the node ball 24 of the upper chord of the reflective surface back frame), and the other end of the first traction mechanism 37 is connected to the third main cable anchor head 35. The third main cable anchor head 35 is adjacent to the first main cable anchor head 33 (adjacently arranged on the cable node plate 18) and is located on the same side of the first upper chord 21.

[0065] One end of the second traction mechanism 38 is connected to the node ball of the second upper chord 22 (the node ball 24 of the upper chord of the reflective surface back frame), and the other end of the second traction mechanism 38 is connected to the fourth main cable anchor head 36. The fourth main cable anchor head 36 is adjacent to the second main cable anchor head 34 (adjacently arranged on the cable node plate 18) and is located on the same side of the second upper chord 22.

[0066] In this embodiment, preferably, the first traction mechanism 37 and the second traction mechanism 38 respectively include: a sling 32 and a hand winch 31; one end of the hand winch 31 is connected to the node ball at the rear end of the first upper chord rod 21 or the second upper chord rod 22 through the sling 32; the other end of the hand winch 31 is connected to the third main cable anchor head 35 or the fourth main cable anchor head 36 through the sling 32.

[0067] The FAST reflective surface unit adaptive connection mechanism replacement force conversion tooling provided in this embodiment can assist in the replacement of the reflective surface unit adaptive connection mechanism, has little impact on the stress of the original structure, and realizes rapid replacement of the adaptive connection mechanism. It has low manual labor intensity, fast progress, and no damage to the original reflective surface unit, thus meeting the needs of reflective surface unit maintenance.

[0068] The tooling process of this embodiment is as follows: (first flip the flippable small reflective panel 30 at the corner point of the reflective surface unit, the small reflective panel 30 is connected to its adjacent panel with two riveted hinges, and the small reflective panel 30 can be rotated backward 180 degrees around the hinge axis).

[0069] 1) First install two main cable anchor head rubber pads 9, main cable anchor head lower clamping tile 5, main cable anchor head upper clamping tile 8, and each pair of upper and lower clamping tiles are connected with two sets of bolt pairs consisting of bolts 6 and nuts 7;

[0070] 2) Install two upper chord rubber pads 10, upper chord lower clamping tiles 11, and upper chord upper clamping tiles 12. Each pair of upper and lower clamping tiles is connected with two sets of bolt pairs consisting of bolts 6 and nuts 7;

[0071] 3) Install the reflective surface support channel steel 4, place the reflective surface support channel steel 4 on the two main cable anchoring head clip tiles 8, insert the studs of the clip tiles 8 on the main cable anchoring head into the long slot holes at both ends of the reflective surface support channel steel 4, and then install nuts 7 on the studs of the clip tiles 8 on the main cable anchoring head to tighten the reflective surface support channel steel 4;

[0072] 4) Install the upper chord connecting steel plate 13, place the upper chord connecting steel plate 13 on the two upper chord upper tiles 12, insert the studs of the upper chord upper tiles 12 into the long slots at both ends of the upper chord connecting steel plate 13, and then install nuts 7 on the studs of the upper chord upper tiles 12 to tighten the upper chord connecting steel plate 13;

[0073] 5) Install the inner conical seat 17 of the reflective surface support column into the middle hole of the reflective surface support channel steel 4, with the inner conical surface at the upper part of the reflective surface support channel steel 4. Then put the reflective surface support nut 15 into the long slot hole on the bottom surface of the upper chord connecting steel plate 13, and screw the reflective surface support column 14 into the reflective surface support nut 15 from the middle long slot hole on the upper side of the upper chord connecting steel plate 13 until the spherical surface at the bottom end of the reflective surface support column 14 contacts the inner conical surface of the inner conical seat 17 of the reflective surface support column;

[0074] 6) Adjust the positions of the upper and lower tiles, rubber pads, upper chord connecting steel plate 13, and reflective surface support channel steel 4, so that the reflective surface support column 14 is basically in a vertical state. In this process, the positions of the upper chord connecting steel plate 13, reflective surface support channel steel 4 and related parts should be adjusted so that the reflective surface support column 14 is located near the vertical symmetric center plane of the upper and lower chords. After the adjustment is completed, pre-tighten the nuts and bolts;

[0075] 7) Install the eye screw 16 on the upper chord connecting steel plate 10, hang the rigging turnbuckle 3 on the eye screw 16, and hang the wire rope sling 2 on the rigging turnbuckle 3. Securely tie the 1-ton sling 1 to the bolt ball node connected to the lower part of the belly bar, connect the upper part of the 1-ton sling 1 to the lower part of the wire rope sling 2, adjust the rigging turnbuckle 3 to the longest position, and then adjust the length of the 1-ton sling so that before the rigging turnbuckle 3 is shortened to the limit position, the tensioning mechanism composed of the 1-ton sling 1, wire rope sling 2, rigging turnbuckle 3 and eye screw 16 can meet the tensioning force requirements;

[0076] 8) Tighten the reflective surface support column 14 so that the reflective surface support nut 15 supports the upper chord connecting steel plate 13, and the two main cable anchor heads replace the reflective surface unit connecting plate 19 to bear the weight of the reflective surface unit, so that the tooling of the invention replaces the 1# connecting mechanism 20 (or 0# connecting mechanism) to support the reflective surface unit.

[0077] 9) Use a 1-ton sling 32 to tie up the main cable anchor head near the reflective surface unit. The other end of the sling 32 is connected to a 1-ton hand chain hoist 31. The lower end of the hand chain hoist 31 is connected to a 1-ton sling 32. The other end of the sling is tied to the rear end ball node ball of the upper chord rod. Adjust the length of the hand chain hoist to tighten the traction mechanism. The upper chord rod node ball at the other end of the reflective surface unit is connected and tensioned with the main cable anchor head on its side by the traction mechanism. By adjusting the length of the two sets of traction mechanisms, the position of the reflective surface is adjusted.

[0078] 10) Remove the end screw 26, anti-loosening washer and retaining ring of the 1# connecting mechanism 20, install the sleeve 29 into the node shaft end of the 1# connecting mechanism, and then replace the retaining ring, anti-loosening washer and end screw 26 to their original positions, and tighten the screw 26 until it is secure and firm; remove the adaptive connecting mechanism force system conversion tooling of the invention to complete the replacement of the adaptive connecting mechanism.

[0079] 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 FAST reflector unit adaptive connection mechanism replacement force system conversion tooling, characterized in that: include: The main cable anchoring head lower clamping tile, the main cable anchoring head upper clamping tile, the main cable anchoring head rubber pad, the upper chord rod lower clamping tile, the upper chord rod upper clamping tile, the upper chord rod rubber pad, the upper chord rod connecting steel plate, the reflective surface support channel steel, the reflective surface support column inner conical seat, the reflective surface support nut and the reflective surface support column and the tensioning mechanism; The main cable anchor head rubber pads are respectively installed on the first main cable anchor head and the second main cable anchor head, and each main cable anchor head rubber pad is respectively installed with a main cable anchor head lower clamping tile and a main cable anchor head upper clamping tile, and the main cable anchor head lower clamping tile and the main cable anchor head upper clamping tile are fixedly connected; The upper chord rod rubber pads are respectively installed on the first upper chord rod and the second upper chord rod, and each of the upper chord rod rubber pads is respectively installed with an upper chord rod lower clamping tile and an upper chord rod upper clamping tile, and the upper chord rod lower clamping tile and the upper chord rod upper clamping tile are fixedly connected; The reflective surface support channel steel is installed between the two main cable anchor head clips; the upper chord connecting steel plate is installed between the two upper chord upper clips; the inner conical seat of the reflective surface support column is arranged in the middle of the reflective surface support channel steel; the reflective surface support nut is located on the bottom surface of the upper chord connecting steel plate; the bottom end of the reflective surface support column is successively passed through the long slot hole in the middle of the upper chord connecting steel plate and the reflective surface support nut and then fixed on the inner conical seat of the reflective surface support column; One end of the tensioning mechanism is connected to the upper chord connecting steel plate, and the other end of the tensioning mechanism is connected to the bolt ball node connected to the lower part of the web; The tensioning mechanism comprises: an eye screw, a wire rope sling, a rigging turnbuckle and a sling; The eye screw is installed on the upper chord connecting steel plate; The rigging turnbuckle is mounted on the eye screw; The wire rope sling is installed on the sling turnbuckle; The lower part of the sling is tied to the bolt ball node connected to the lower part of the web, and the upper part of the sling is connected to the wire rope sling; A stud is provided on the top of the tile clamping head of the main cable anchoring head; The reflective surface supporting channel steel is provided with long slot holes at both ends; The two studs with tiles on the main cable anchoring heads are respectively inserted into the long slot holes at both ends of the reflecting surface supporting channel steel, and the reflecting surface supporting channel steel is fastened by installing nuts on the studs with tiles on the main cable anchoring heads.

2. The FAST reflector unit adaptive connection mechanism replacement force system conversion tooling according to claim 1 is characterized in that: A stud is provided on the top of the tile clamp on the upper chord; The upper chord connecting steel plate is provided with long slot holes at both ends; The two studs for clamping tiles on the upper chord rod are respectively inserted into the long slots at both ends of the upper chord rod connecting steel plate, and the upper chord rod connecting steel plate is fastened by installing nuts on the studs for clamping tiles on the upper chord rod.

3. The FAST reflector unit adaptive connection mechanism replacement force system conversion tooling according to claim 1 is characterized in that: A mounting hole is provided in the middle of the reflective surface supporting channel steel; The inner conical seat of the reflective surface support column is installed in the mounting hole in the middle of the reflective surface support channel steel, and the inner conical surface of the inner conical seat of the reflective surface support column is located above the reflective surface support channel steel; The spherical surface at the lower end of the reflecting surface support column contacts the inner conical surface of the inner conical surface seat of the reflecting surface support column, so as to limit the three translational degrees of freedom of the spherical surface at the lower end of the reflecting surface support column.

4. The FAST reflector unit adaptive connection mechanism replacement force system conversion tooling according to claim 1 is characterized in that: The cross section of the reflective surface support nut is T-shaped; The width of the upper part of the reflecting surface support nut is smaller than the width of the lower part of the reflecting surface support nut; the upper part of the reflecting surface support nut and the middle long slot hole of the upper chord connecting steel plate are clearance fit, which is used to limit the rotational freedom of the reflecting surface support nut around the center line of the thread.

5. The FAST reflector unit adaptive connection mechanism replacement force system conversion tooling according to claim 1 is characterized in that: A cross bar is welded on the upper part of the reflective surface support column; The vertical rod of the reflective surface support column is provided with an external thread; A spherical surface is arranged at the lower part of the reflective surface supporting column.

6. The FAST reflector unit adaptive connection mechanism replacement force system conversion tooling according to claim 1 is characterized in that: Also includes: a first traction mechanism and a second traction mechanism; One end of the first traction mechanism is connected to the node ball of the first upper chord, and the other end of the first traction mechanism is connected to the third main cable anchor head, and the third main cable anchor head is adjacent to the first main cable anchor head and is located on the same side of the first upper chord; One end of the second traction mechanism is connected to the node ball of the second upper chord, and the other end of the second traction mechanism is connected to the fourth main cable anchor head. The fourth main cable anchor head is adjacent to the second main cable anchor head and is located on the same side of the second upper chord.

7. The FAST reflector unit adaptive connection mechanism replacement force system conversion tooling according to claim 6 is characterized in that: The first traction mechanism and the second traction mechanism respectively include: a sling and a hand chain hoist; one end of the hand chain hoist is connected to the node ball at the rear end of the first upper chord rod or the second upper chord rod through the sling; the other end of the hand chain hoist is connected to the third main cable anchor head or the fourth main cable anchor head through the sling.

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