Center connecting node of cable membrane structure

Abstract

The utility model discloses a cable-membrane structure center connection node, and relates to the technical field of cable-membrane buildings. The cable membrane connecting node solves the problems that an existing cable membrane connecting node is poor in universality, low in error-tolerant rate, tedious in operation process, low in working efficiency and large in labor cost. An upper seat plate and a lower seat plate are both of a regular polygon plate-shaped structure, a plurality of cable connecting assemblies are arranged between the upper seat plate and the lower seat plate in the circumferential direction, a guide rail sliding block mechanism is arranged between the upper seat plate and the lower seat plate, and two sets of guide rails are horizontally and oppositely installed on the lower surface of the upper seat plate and the upper surface of the lower seat plate respectively. A sliding block locking piece is installed on the upper seat plate, the guide rail located on the upper portion and the sliding block are fixed through the sliding block locking piece, a horizontally-arranged cable connecting hole is formed in the middle of the sliding block, and one end of the cable connecting assembly is rotationally installed in the cable connecting hole of the sliding block. According to the cable-membrane connecting joint, the universality, the installation error-tolerant rate and the working efficiency of the cable-membrane connecting joint are improved, the operation process is simplified, and the labor cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to cable membrane construction technical field, concretely relates to a cable membrane structure center connecting joint. BACKGROUND

[0002] The tension type cable membrane structure is relied on the tension stress of the membrane itself and the support rod and the cable to constitute the mechanism system together. The tension membrane structure is often used for building the city building roof, such as stadium, exhibition hall, traffic hub and industrial plant etc. The cable dome is a common tension type cable membrane structure, and the cable dome structure adopts a large number of prestressed cables, and the compression bar is less and short, so that the tensile strength of steel can be fully exerted, and the structural efficiency is extremely high. At present, the membrane under cable of the existing cable dome is fixedly connected with the cable membrane center joint, and due to the fact that the length of the membrane under cable is relatively long, the torsional stress is prone to being generated in the installation process, so that the workers need to manually eliminate the torsional stress when installing the membrane under cable, generally, multiple workers manually eliminate the torsional stress of the same membrane under cable, the operation process is complicated, and the working efficiency is greatly reduced, and a large amount of manpower is consumed. In addition, the cable membrane center joint of the existing cable dome is fixedly connected with the support frame, so that the fault tolerance is low when connecting the membrane under cable and the cable membrane center joint, and the abutment is prone to being difficult due to the processing error or the assembly error.

[0003] In summary, the existing cable membrane connecting joint has the problems of poor universality, low fault tolerance, complicated operation process, low working efficiency and large labor cost. UTILITY MODEL CONTENTS

[0004] The utility model discloses a cable membrane structure center connecting joint, which can solve the problems of poor universality, low fault tolerance, complicated operation process, low working efficiency and large labor cost of the existing cable membrane connecting joint.

[0005] The technical scheme of the utility model is:

[0006] A cable membrane structure center connecting node, it includes center node structure, center node structure is installed in support frame 1 top, center node structure includes support 2, membrane structure connecting assembly 3 and multiple cable connecting assembly 4, support 2 includes by upper to lower sequentially arranged upper seat plate 201, intermediate column 202 and lower seat plate 203, upper seat plate 201 top installs membrane structure connecting assembly 3, upper seat plate 201 and lower seat plate 203 are all regular polygon plate structure, upper seat plate 201 and lower seat plate 203 between are provided with multiple cable connecting assembly 4 along the circumferential direction, each cable connecting assembly 4 includes guide rail sliding block mechanism 401, sliding block locking piece 402 and cable connecting piece 403, upper seat plate 201 and lower seat plate 203 between are provided with guide rail sliding block mechanism 401, two groups of guide rails 4011 of guide rail sliding block mechanism 401 are respectively horizontally opposite installed in upper seat plate 201 lower surface and lower seat plate 203 upper surface, upper seat plate 201 installs sliding block locking piece 402, the guide rail 4011 in the upper portion and the sliding block 4012 of guide rail sliding block mechanism 401 between are fixed through sliding block locking piece 402, the sliding block 4012 middle part is provided with horizontally arranged cable connecting hole, one end of cable connecting assembly 4 is rotatably installed in the cable connecting hole of sliding block 4012.

[0007] Further, membrane structure connecting assembly 3 includes support rod 301, cross sleeve 302, four L-shaped connecting plates 303, four plate connecting pieces 304 and four membrane structure connecting pieces 305, support rod 301 is vertically arranged in the upper seat plate 201 directly above, support rod 301 bottom is provided with rod connecting flange 306, rod connecting flange 306 is fixedly connected with upper seat plate 201, support rod 301 top end connects horizontally arranged cross sleeve 302, four sleeve ends of cross sleeve 302 are connected with one end of four L-shaped connecting plates 303 through four plate connecting pieces 304 respectively, the other end of four L-shaped connecting plates 303 is installed four membrane structure connecting pieces 305 respectively.

[0008] Further, membrane structure connecting piece 305 includes membrane structure connecting bolt 3051, membrane structure connecting nut 3052 and backing plate 3053, the lower portion of L-shaped connecting plate 303 is provided with horizontally arranged backing plate 3053, membrane structure 5 is arranged between backing plate 3053 and horizontal plate segment, the lower surface of horizontal plate segment and the upper surface of membrane structure 5 are in contact, the upper surface of backing plate 3053 and the lower surface of membrane structure 5 are in contact, horizontal plate segment, membrane structure 5 and backing plate 3053 are fixedly connected through membrane structure connecting bolt 3051 and membrane structure connecting nut 3052.

[0009] Further, the sliding block locking member 402 comprises a sliding block locking bolt 4021 and a sliding block locking nut 4022. The sliding block locking bolt 4021 is a flat head bolt. The upper surface of the upper seat plate 201 is provided with a vertically arranged sliding block locking threaded hole. The upper guide rail 4011 is provided with a sliding block locking light hole coaxially arranged with the sliding block locking threaded hole. The sliding block locking threaded hole and the sliding block locking light hole are both opposite to the sliding block 4012. The lower end of the sliding block locking bolt 4021 penetrates through the sliding block locking threaded hole and the sliding block locking light hole and abuts against the upper surface of the sliding block 4012. The sliding block locking bolt 4021 is provided with the sliding block locking nut 4022 threadedly mounted on the upper surface of the upper seat plate 201. The sliding block locking bolt 4021 is locked and connected with the upper seat plate 201 through the sliding block locking nut 4022.

[0010] Further, the cable connecting member 403 comprises a stepped mandrel 4031 and a mandrel supporting bearing 4032. The sliding block 4012 is in a circular ring sleeve structure. One end of the stepped mandrel 4031 is coaxially inserted into the inner hole of the sliding block 4012. The stepped mandrel 4031 is rotationally connected with the sliding block 4012 through the mandrel supporting bearing 4032.

[0011] Further, the cable connecting member 403 further comprises a stop nut 4033, an end plate 4034 and a tensioning screw 4035. One end of the sliding block 4012 is provided with a bearing outer ring stop ring 4013 extending radially inward. The outer side surface of the bearing outer ring stop ring 4013 abuts against one side end of the outer ring of the mandrel supporting bearing 4032. The other end of the sliding block 4012 is provided with an external thread. One end of the stop nut 4033 is provided with an annular groove outwardly arranged in the axial direction. The outer side surface of the annular groove is provided with an internal thread. The other end of the sliding block 4012 is inserted into the annular groove of the stop nut 4033. The sliding block 4012 is threadedly connected with the stop nut 4033. The lower part of one end of the stop nut 4033 abuts against the other end of the outer ring of the mandrel supporting bearing 4032. One side of the stepped mandrel 4031 is provided with the end plate 4034 coaxially arranged. The outer side surface of the end plate 4034 is radially provided with a sliding block stop ring. The center of one side end surface of the stepped mandrel 4031 close to the end plate 4034 is provided with an end cover connecting threaded hole. The end plate 4034 is provided with an end plate mounting threaded hole coaxially arranged with the end cover connecting threaded hole. One end of the tensioning screw 4035 is threadedly connected with the end plate mounting threaded hole and the end cover connecting threaded hole in sequence. The other end of the stepped mandrel 4031 abuts against one end of the inner ring of the mandrel supporting bearing 4032. The end surface of the middle shaft segment of the stepped mandrel 4031 abuts against the other end of the inner ring of the mandrel supporting bearing 4032.

[0012] Further, the outer side surface of one end of the sliding block 4012 extends radially outwardly and is provided with a guide rail stop ring. The end surface of the guide rail stop ring abuts against one end of the upper guide rail 4011. The upper part of one end of the stop nut 4033 abuts against the other end of the upper guide rail 4011.

[0013] Furthermore, the cable connector 403 also includes a cable connector sleeve 4036 and a cable connector pin 4037. A radial pin hole is machined on the side of the stepped mandrel 4031 away from the end plate 4034. The cable connector sleeve 4036 is fixedly connected to the stepped mandrel 4031 through the cable connector pin 4037. A cable structure 6 is inserted into the inner hole of the cable connector sleeve 4036. The cable structure 6 and the cable connector sleeve 4036 are axially positioned by a boss structure.

[0014] Compared with the prior art, the present invention has the following advantages:

[0015] 1. Compared with the traditional cable dome where the under-membrane steel cable and the cable membrane center node are fixedly connected, the cable structure and cable connection components of this invention adopt a bearing connection, which enables automatic rotation between the two. This effectively eliminates the torsional stress generated by the under-membrane steel cable during installation, eliminates the need for manual intervention, effectively improves work efficiency, and saves a lot of labor costs.

[0016] 2. Compared with the traditional fixed connection between the cable membrane center node and the support frame of the cable dome, the cable connection component of this invention adopts a guide rail slider mechanism for sliding connection with the support, which effectively improves the fault tolerance rate when installing the steel cable under the membrane and the cable membrane center node, and makes it easier to achieve docking between the two. The guide rail and the slider are locked with slider locking bolts and slider locking nuts, which not only ensures the locking effect, but also improves the convenience of connection. Attached Figure Description

[0017] Figure 1 This is a front view of the central connecting node of the cable membrane structure of the present invention;

[0018] Figure 2 This is a top view of the central connecting node of the cable membrane structure of the present invention;

[0019] Figure 3 yes Figure 2 Sectional view at AA;

[0020] Figure 4 yes Figure 3 A magnified view of a section at point B.

[0021] In the figure: 1, support frame; 2, support; 3, membrane structure connecting assembly; 4, cable connecting assembly; 5, membrane structure; 6, cable structure; 201, upper seat plate; 202, middle stand column; 203, lower seat plate; 301, support rod; 302, cross sleeve; 303, L-shaped connecting plate; 304, plate connecting piece; 305, membrane structure connecting piece; 3051, membrane structure connecting bolt; 3052, membrane structure connecting nut; 3053, gasket plate; 401, guide rail sliding block mechanism; 402, sliding block locking piece; 403, cable connecting assembly; 4011, guide rail; 4012, sliding block; 4021, sliding block locking bolt; 4022, sliding block locking nut; 4031, stepped mandrel; 4032, mandrel support bearing; 4033, stop nut; 4034, end plate; 4035, tensioning screw; 4036, cable connecting sleeve; 4037, cable connecting pin. DETAILED DESCRIPTION

[0022] DETAILED DESCRIPTION Figures 1 to 4 In this embodiment, a central connecting node of a cable-membrane structure includes a central node structure installed at the top end of a support frame 1. The central node structure includes a support 2, a membrane structure connecting assembly 3, and a plurality of cable connecting assemblies 4. The support 2 includes an upper seat plate 201, a middle stand column 202, and a lower seat plate 203 arranged in sequence from top to bottom. The membrane structure connecting assembly 3 is installed on the top of the upper seat plate 201. The upper seat plate 201 and the lower seat plate 203 are both regular polygon plate structures. A plurality of cable connecting assemblies 4 are arranged between the upper seat plate 201 and the lower seat plate 203 in the circumferential direction. Each cable connecting assembly 4 includes a guide rail sliding block mechanism 401, a sliding block locking piece 402, and a cable connecting piece 403. The guide rail sliding block mechanism 401 is arranged between the upper seat plate 201 and the lower seat plate 203. Two groups of guide rails 4011 of the guide rail sliding block mechanism 401 are respectively installed horizontally opposite to the lower surface of the upper seat plate 201 and the upper surface of the lower seat plate 203. The sliding block locking piece 402 is installed on the upper seat plate 201. The upper guide rail 4011 and the sliding block 4012 of the guide rail sliding block mechanism 401 are fixed by the sliding block locking piece 402. A cable connecting hole is horizontally arranged in the middle of the sliding block 4012. One end of the cable connecting assembly 4 is rotatably installed in the cable connecting hole of the sliding block 4012.

[0023] When the upper seat plate 201 and the lower seat plate 203 are both square, the number of corresponding cable connecting assemblies 4 is four. The four cable connecting assemblies 4 are arranged on the four edges of the square upper and lower seat plates, respectively.

[0024] When the upper seat plate 201 and the lower seat plate 203 are both regular pentagons, the number of corresponding cable connecting assemblies 4 is five. The five cable connecting assemblies 4 are arranged on the five edges of the regular pentagonal upper and lower seat plates, respectively.

[0025] …

[0026] When the upper seat plate 201 and the lower seat plate 203 are both regular octagons, the number of corresponding cable connecting assemblies 4 is eight, and the eight cable connecting assemblies 4 are respectively arranged on the eight edges of the upper and lower seat plates of the regular octagon.

[0027] Wherein, the support 2 can be designed as an integral structure or a split structure, the support 2 of the integral structure can be manufactured by machining; the upper seat plate 201, the middle column 202 and the lower seat plate 203 of the support 2 of the split structure can be connected by welding or bolting.

[0028] Specific implementation method two: combined with Figures 1 to 4 It is illustrated that the membrane structure connecting assembly 3 of the embodiment includes a support rod 301, a cross sleeve 302, four L-shaped connecting plates 303, four plate connecting pieces 304 and four membrane structure connecting pieces 305, the support rod 301 is vertically arranged directly above the upper seat plate 201, the bottom of the support rod 301 is provided with a rod connecting flange 306, the rod connecting flange 306 is fixedly connected with the upper seat plate 201, the top end of the support rod 301 is connected with the horizontally arranged cross sleeve 302, the four sleeve ends of the cross sleeve 302 are respectively connected with one end of the four L-shaped connecting plates 303 through the four plate connecting pieces 304, and the other end of the four L-shaped connecting plates 303 is respectively installed with the four membrane structure connecting pieces 305. In this way, the membrane structure 5 is arranged below the cross sleeve 302, a rod mounting hole matched with the support rod 301 is processed on the membrane structure 5, and the horizontal plate segments of the four L-shaped connecting plates 303 are connected with the membrane structure 5 through the membrane structure connecting pieces 305. The other components and connection relationships are the same as those of the specific implementation method one.

[0029] Specific implementation method three: combined with Figures 1 to 4 It is illustrated that the membrane structure connecting piece 305 of the embodiment includes a membrane structure connecting bolt 3051, a membrane structure connecting nut 3052 and a backing plate 3053, the backing plate 3053 is horizontally arranged below the horizontal plate segment of the L-shaped connecting plate 303, the membrane structure 5 is arranged between the backing plate 3053 and the horizontal plate segment, the lower surface of the horizontal plate segment is in contact with the upper surface of the membrane structure 5, the upper surface of the backing plate 3053 is in contact with the lower surface of the membrane structure 5, and the horizontal plate segment, the membrane structure 5 and the backing plate 3053 are fixedly connected through the membrane structure connecting bolt 3051 and the membrane structure connecting nut 3052. In this way, the upper and lower sides of the membrane structure are respectively in contact with the horizontal plate segment and the backing plate 3053, and the contact area is expanded in the form of expanding the contact area, so as to avoid damage to the membrane structure 5 caused by the membrane structure connecting bolt 3051. At the same time, a rigid reinforcing ring can be arranged at the hole of the membrane structure 5 to protect the membrane structure. The other components and connection relationships are the same as those of the specific implementation method one or two.

[0030] Specific implementation method four: combined with Figures 1 to 4In this embodiment, the slider locking piece 402 includes a slider locking bolt 4021 and a slider locking nut 4022. The slider locking bolt 4021 is a flat head bolt. The upper surface of the upper seat plate 201 is provided with a vertically arranged slider locking threaded hole. The upper guide rail 4011 is provided with a slider locking light hole coaxially arranged with the slider locking threaded hole. The slider locking threaded hole and the slider locking light hole are both opposite to the slider 4012. The lower end of the slider locking bolt 4021 penetrates through the slider locking threaded hole and the slider locking light hole and abuts against the upper surface of the slider 4012. The slider locking bolt 4021 is provided with a threaded segment above the upper seat plate 201, and the slider locking nut 4022 is installed on the threaded segment. The slider locking bolt 4021 and the upper seat plate 201 are locked and connected through the slider locking nut 4022. In this way, the cable connecting assembly 4 and the support 2 are slidably connected through the guide rail and slider mechanism 401, effectively improving the fault tolerance rate during installation of the under-membrane steel cable and the cable-membrane center node, and more easily realizing the butt joint of the two. The guide rail 4011 and the slider 4012 are locked through the slider locking bolt 4021 and the slider locking nut 4022, which not only ensures the locking effect but also improves the convenience of connection. The other components and connection relationships are the same as those in the first, second or third embodiment.

[0031] Specific embodiment five: combination Figures 1 to 4 In this embodiment, the cable connecting piece 403 includes a stepped mandrel 4031 and a mandrel supporting bearing 4032. The slider 4012 is a circular ring-shaped sleeve structure. One end of the stepped mandrel 4031 is coaxially inserted into the inner hole of the slider 4012, and the stepped mandrel 4031 is rotationally connected with the slider 4012 through the mandrel supporting bearing 4032. In this way, the cable structure and the cable connecting piece 403 are connected through a bearing, which enables automatic rotation between the two, effectively eliminates the torsional stress generated during installation of the under-membrane steel cable, and saves a lot of labor cost. The other components and connection relationships are the same as those in the first, second, third or fourth embodiment.

[0032] Specific embodiment six: combination Figures 1 to 4To illustrate the embodiment, the cable connector 403 of the embodiment further comprises a stop nut 4033, an end plate 4034 and a tensioning screw 4035, the inner side of one end of the sliding block 4012 is provided with a bearing outer ring stop ring 4013 extending radially inward, the outer side of the bearing outer ring stop ring 4013 abuts one side end of the outer ring of the mandrel supporting bearing 4032, the outer side of the other end of the sliding block 4012 is machined with external threads, the one end of the stop nut 4033 is provided with an annular groove in the axial direction, the outer side of the annular groove is machined with internal threads, the other end of the sliding block 4012 is inserted into the annular groove of the stop nut 4033, the sliding block 4012 is threadedly connected with the stop nut 4033, the lower part of the one end of the stop nut 4033 abuts the other end of the outer ring of the mandrel supporting bearing 4032, the side of the stepped mandrel 4031 is provided with the coaxially arranged end plate 4034, the outer side of the end plate 4034 is machined with a sliding block stop ring in the radial direction, the center of the side end face of the stepped mandrel 4031 close to the end plate 4034 is machined with an end cover connecting threaded hole, the end plate 4034 is machined with an end plate mounting threaded hole coaxially arranged with the end cover connecting threaded hole, one end of the tensioning screw 4035 is threadedly connected with the end plate mounting threaded hole and the end cover connecting threaded hole in sequence, the other end of the stepped mandrel 4031 abuts one end of the inner ring of the mandrel supporting bearing 4032, and the end face of the middle shaft segment of the stepped mandrel 4031 abuts the other end of the inner ring of the mandrel supporting bearing 4032. The other components and connection relationships are the same as those of the first, second, third, fourth or fifth embodiment.

[0033] Specific embodiment seven: in combination Figures 1 to 4 To illustrate the embodiment, the outer side of one end of the sliding block 4012 of the embodiment extends radially outwardly with a guide rail stop ring, and the end face of the guide rail stop ring abuts one end of the guide rail 4011 located above. The other end of the stop nut 4033 abuts the other end of the guide rail 4011 located above. The other components and connection relationships are the same as those of the first, second, third, fourth, fifth or sixth embodiment.

[0034] Specific embodiment eight: in combination Figures 1 to 4 To illustrate the embodiment, the cable connector 403 of the embodiment further comprises a cable connecting sleeve 4036 and a cable connecting pin 4037, and the side of the stepped mandrel 4031 away from the end plate 4034 is machined with a radial pin hole. The cable connecting sleeve 4036 is fixedly connected with the stepped mandrel 4031 through the cable connecting pin 4037, and a cable structure 6 is inserted into the inner hole of the cable connecting sleeve 4036. The cable structure 6 and the cable connecting sleeve 4036 are axially positioned through a boss structure. The other components and connection relationships are the same as those of the first, second, third, fourth, fifth, sixth or seventh embodiment.

[0035] Working principle

[0036] In combination Figures 1 to 4 To illustrate the working principle of the cable membrane structure center connecting node of the utility model:

[0037] Firstly, the membrane structure is laid under the L-shaped connecting plate 303, then the backing plate 3053 is installed under the membrane structure and corresponds to the transverse plate segment of the L-shaped connecting plate 303, the L-shaped connecting plate 303 and the backing plate 3053 are fixed by using the sliding block locking bolt 4021 and the sliding block locking nut 4022, thereby realizing the fixed connection of the membrane structure;

[0038] Then, the relative position between the sliding block 4012 and the upper and lower two rails 4011 is determined according to the installation position of the membrane-under cable, since the sliding block 4012 and the upper and lower two rails 4011 are in sliding fit, the locking between the rail and the sliding block can be realized by using the sliding block locking bolt and the sliding block locking nut.

[0039] Finally, one end of the cable structure passes through the cable connecting sleeve 4036, and the axial positioning is realized by the boss structure. The cable connecting sleeve 4036 is fixed with the stepped shaft 4031 by the cable connecting pin 4037. The stepped shaft 4031 and the sliding block 4012 are rotatably connected by the shaft support bearing 4032, which can effectively eliminate the torsional stress generated in the installation process of the membrane-under cable.

[0040] The above embodiments are only used to illustrate the technical solutions of the present application, but not limit it; although the present application is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can be modified, or some technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solution deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A central connection node for a cable membrane structure, comprising a central node structure mounted at the top end of a support frame (1), characterized in that: The center node structure comprises a support (2), a membrane structure connecting assembly (3) and a plurality of cable connecting assemblies (4), the support (2) comprises an upper seat plate (201), an intermediate stand (202) and a lower seat plate (203) arranged in sequence from top to bottom, the membrane structure connecting assembly (3) is installed on the top of the upper seat plate (201), the upper seat plate (201) and the lower seat plate (203) are both regular polygon plate structures, a plurality of cable connecting assemblies (4) are arranged between the upper seat plate (201) and the lower seat plate (203) in the circumferential direction, each cable connecting assembly (4) comprises a guide rail sliding block mechanism (401), a sliding block locking piece (402) and a cable connecting piece (403), the guide rail sliding block mechanism (401) is arranged between the upper seat plate (201) and the lower seat plate (203), two groups of guide rails (4011) of the guide rail sliding block mechanism (401) are respectively horizontally and oppositely installed on the lower surface of the upper seat plate (201) and the upper surface of the lower seat plate (203), the sliding block locking piece (402) is installed on the upper seat plate (201), the upper guide rail (4011) and the sliding block (4012) of the guide rail sliding block mechanism (401) are fixed through the sliding block locking piece (402), a cable connecting hole horizontally arranged in the middle of the sliding block (4012), and one end of the cable connecting assembly (4) is rotatably installed in the cable connecting hole of the sliding block (4012).

2. A central connection node for a cable membrane structure according to claim 1, characterized in that: The membrane structure connecting assembly (3) comprises a support rod (301), a cross sleeve (302), four L-shaped connecting plates (303), four plate connecting pieces (304) and four membrane structure connecting pieces (305), the support rod (301) is vertically arranged directly above the upper seat plate (201), the support rod (301) is provided with a rod connecting flange (306) at the bottom, the rod connecting flange (306) is fixedly connected with the upper seat plate (201), the support rod (301) is connected with the horizontally arranged cross sleeve (302) at the top end, the four sleeve ends of the cross sleeve (302) are connected with one end of the four L-shaped connecting plates (303) through the four plate connecting pieces (304) respectively, and the other end of the four L-shaped connecting plates (303) is respectively provided with the four membrane structure connecting pieces (305).

3. A central connection node for a cable membrane structure according to claim 2, characterized in that: The membrane structure connecting piece (305) comprises a membrane structure connecting bolt (3051), a membrane structure connecting nut (3052) and a backing plate (3053), the L-shaped connecting plate (303) is provided with the horizontally arranged backing plate (3053) below the horizontal plate section, the membrane structure (5) is arranged between the backing plate (3053) and the horizontal plate section, the lower surface of the horizontal plate section is in contact with the upper surface of the membrane structure (5), the lower surface of the membrane structure (5) is in contact with the upper surface of the backing plate (3053), and the horizontal plate section, the membrane structure (5) and the backing plate (3053) are fixedly connected through the membrane structure connecting bolt (3051) and the membrane structure connecting nut (3052).

4. A central connection node for a cable membrane structure according to claim 1 or 3, characterized in that: The slider locking piece (402) comprises a slider locking bolt (4021) and a slider locking nut (4022). The slider locking bolt (4021) is a flat head bolt. A vertical slider locking threaded hole is formed in the upper surface of the upper seat plate (201). The upper guide rail (4011) is provided with a slider locking light hole coaxially arranged with the slider locking threaded hole. The slider locking threaded hole and the slider locking light hole are both opposite to the slider (4012). The lower end of the slider locking bolt (4021) penetrates through the slider locking threaded hole and the slider locking light hole and abuts against the upper surface of the slider (4012). The slider locking bolt (4021) is provided with a threaded segment above the upper seat plate (201) for mounting the slider locking nut (4022). The slider locking bolt (4021) is locked and connected with the upper seat plate (201) through the slider locking nut (4022).

5. A central connection node for a cable membrane structure according to claim 4, characterized in that: The cable connecting piece (403) comprises a stepped mandrel (4031) and a mandrel supporting bearing (4032). The slider (4012) is a circular ring-shaped sleeve structure. One end of the stepped mandrel (4031) is coaxially inserted into the inner hole of the slider (4012). The stepped mandrel (4031) is rotationally connected with the slider (4012) through the mandrel supporting bearing (4032).

6. A central connection node for a cable membrane structure according to claim 5, characterized in that: The cable connecting piece (403) further comprises a stop nut (4033), an end plate (4034) and a tensioning screw (4035). One end of the slider (4012) is provided with a bearing outer ring stop ring (4013) extending radially inward. The outer side surface of the bearing outer ring stop ring (4013) abuts against one side end of the outer ring of the mandrel supporting bearing (4032). The other end of the slider (4012) is provided with an external thread. One end of the stop nut (4033) is provided with an annular groove extending axially outward. An internal thread is formed on the outer side surface of the annular groove. The other end of the slider (4012) is inserted into the annular groove of the stop nut (4033). The slider (4012) is threadedly connected with the stop nut (4033). The lower part of one end of the stop nut (4033) abuts against the other end of the outer ring of the mandrel supporting bearing (4032). One side of the stepped mandrel (4031) is provided with the end plate (4034) arranged coaxially. The outer side surface of the end plate (4034) is radially processed to form a slider stop ring. A end cover connecting threaded hole is formed in the center of the side end surface of the stepped mandrel (4031) close to the end plate (4034). An end plate mounting threaded hole coaxially arranged with the end cover connecting threaded hole is formed on the end plate (4034). One end of the tensioning screw (4035) is threadedly connected with the end plate mounting threaded hole and the end cover connecting threaded hole in sequence. The other end of the stepped mandrel (4031) abuts against one end of the inner ring of the mandrel supporting bearing (4032). The end surface of the middle shaft segment of the stepped mandrel (4031) abuts against the other end of the inner ring of the mandrel supporting bearing (4032).

7. A central connection node for a cable membrane structure according to claim 6, characterized in that: The outer side surface of one end of the slider (4012) extends radially outward to form a guide rail stop ring. The end surface of the guide rail stop ring abuts against one end of the upper guide rail (4011). The upper part of one end of the stop nut (4033) abuts against the other end of the upper guide rail (4011).

8. A cable-membrane structure central connection node according to claim 7, characterized in that: The cable connecting piece (403) further comprises a cable connecting sleeve (4036) and a cable connecting pin (4037), the stepped mandrel (4031) is processed with a radial pin hole away from one side of the end plate (4034), the cable connecting sleeve (4036) is fixedly connected with the stepped mandrel (4031) through the cable connecting pin (4037), and the cable structure (6) is inserted into the inner hole of the cable connecting sleeve (4036), and the cable structure (6) and the cable connecting sleeve (4036) are axially positioned through the boss structure.

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