A structure of a close-mesh net for a socket-coupled external scaffolding and an installation method

Abstract

The present invention discloses a structure and installation method of a close-mesh net for a disc-fastening external scaffolding, which relates to the technical field of building construction. It includes a number of connecting columns, and a pair of channel steel rings are fixedly arranged at the upper and lower ends of the connecting columns. A pair of vertical rods are arranged on the outer sides of the pair of channel steel rings facing away from each other. First clamping blocks are fixedly arranged at both ends of each vertical rod, and each channel steel ring is connected to the corresponding first clamping block through a limiting mechanism; a fixing ring is sleeved on the middle part of the connecting column, and four fixing shafts are fixedly arranged on the outer ring surface of the fixing ring. A rectangular sleeve is fixedly arranged at the outer end of each fixing shaft, and a cross bar is arranged on the outer side of the outer port of each rectangular sleeve. Second clamping blocks are fixedly arranged at both ends of each cross bar, and each rectangular sleeve is connected to the corresponding second clamping block through a clamping mechanism. The present invention uses a standardized, efficient and beautiful rigid close-mesh net, which not only facilitates construction, greatly improves construction efficiency, but also improves utilization rate and safety.

Description

Technical Field

[0001] The present invention relates to the technical field of building construction, and particularly relates to a structure and installation method of a close-mesh net for a disc-locking external scaffolding. Background Art

[0002] In building construction, the main scaffolding used for quickly erecting a high-formwork support system is the scaffolding. There are many types of scaffolding. Among them, the disc-locking steel pipe scaffolding system is widely used in building construction due to its advantages such as strong load-bearing capacity, safety and reliability, economy and beauty.

[0003] The Chinese utility model discloses a quick rewinding device for a close-mesh net for environmental protection at a building construction site (publication number: CN212768835U), which includes a workbench. Three support frames are fixedly connected to the upper end of the workbench. A guide roller is rotatably connected to the right support frame, a tensioning roller is rotatably connected to the middle support frame, a motor is fixedly connected to the side end of the left support frame, a rotating shaft is fixedly connected to the middle of the motor, a support plate is fixedly connected to the left support frame through bolts, a through hole is provided in the middle of the support plate, the rotating shaft is rotatably connected to the through hole, a guide plate is fixedly connected to the left side of the rotating shaft, and ear plates are fixedly connected to both sides in the middle of the guide plate.

[0004] The current disc-locking steel pipe scaffolding has the following disadvantages: 1. When it is necessary to externally hang a close-mesh net, connection components are mostly used to connect the close-mesh net and the scaffolding. The gap between the connection components and the fixed pipe shakes, increasing the possibility of damage to the close-mesh net and the connection components; 2. The traditional flexible close-mesh net has problems such as low installation and disassembly turnover efficiency, difficult cleaning, and unaesthetic appearance. As the close-mesh net is exposed to sunlight, it causes the close-mesh net to age. Since the close-mesh net is wound tightly during rewinding, it is inconvenient to install and disassemble the steel pipe scaffolding. Summary of the Invention

[0005] The purpose of the present invention is to solve the disadvantages that there are unsafe factors during the disassembly process of the close-mesh net of the disc-locking scaffolding in the prior art and the utilization rate is low due to damage to the close-mesh net, and to propose a structure and installation method of a close-mesh net for a disc-locking external scaffolding.

[0006] In order to solve the problems that there are unsafe factors during the disassembly process of the close-mesh net of the disc-locking scaffolding in the prior art and the utilization rate is low due to damage to the close-mesh net, the present invention adopts the following technical solutions:

[0007] A structure of a close-mesh net for a disc-locking external scaffolding includes a plurality of connecting columns. A pair of symmetrically distributed channel steel rings are fixedly provided at the upper and lower ends of the connecting columns. A pair of vertical rods are provided on the outer sides of the pair of channel steel rings facing away from each other. First clamping blocks are fixedly provided at both ends of each vertical rod. Each channel steel ring is connected to the corresponding first clamping block through a limiting mechanism;

[0008] A fixing ring is concentrically and fixedly sleeved on the middle part of the connecting column. Four fixing shafts arranged in a circular pattern are fixedly provided on the outer ring surface of the fixing ring. A rectangular sleeve is fixedly provided at the outer end of each fixing shaft. A cross bar is provided outside the outer port of each rectangular sleeve. Second clamping blocks are fixedly provided at both ends of each cross bar. Each rectangular sleeve is connected to the corresponding second clamping block through a clamping mechanism.

[0009] Preferably, the limiting mechanism includes a limiting clamping ring and a limiting sliding plate. Four rectangular notches arranged in a circular pattern are opened on the outer ring surface of the channel steel ring. A limiting clamping ring is concentrically and fixedly provided in the middle of the channel steel ring. The limiting clamping ring is in the shape of a copper coin with a square inside and a circle outside. Four limiting sliding holes arranged in a circular pattern are opened on the outer ring surface of the limiting clamping ring. The limiting sliding holes correspond to the rectangular notches one by one.

[0010] A limiting sliding plate connected in a sliding manner is provided inside each limiting sliding hole. Four uniformly distributed first clamping grooves are opened on the outer side surface of the first clamping block. The relative inner ends of each limiting sliding plate abut against the corresponding first clamping grooves.

[0011] Preferably, a pair of limiting rotating rings are provided on the upper and lower sides of the limiting clamping ring. The outer ring surfaces of the pair of limiting rotating rings are rotatably connected to the inner ring surface of the channel steel ring. A pair of first elliptical pin holes are opened on the left and right sides of the top surface of the upper limiting rotating ring. A pair of second elliptical pin holes are opened on the front and back sides of the top surface of the lower limiting rotating ring. U-shaped notches are opened on the left and right sides of the top surface and the front and back sides of the bottom surface of the limiting clamping ring. Each U-shaped notch communicates with the corresponding limiting sliding hole.

[0012] Preferably, a pair of U-shaped notches on the left and right sides correspond to a pair of first elliptical pin holes, and a pair of U-shaped notches on the front and back sides correspond to a pair of second elliptical pin holes. A limiting pin shaft connected in a sliding and clamping manner is provided inside each U-shaped notch. The relative ends of each limiting pin shaft are fixedly connected to the corresponding limiting sliding plate. The top ends of the limiting pin shafts on the left and right sides are slidably inserted into the corresponding first elliptical pin holes, and the bottom ends of the limiting pin shafts on the front and back sides are slidably inserted into the corresponding second elliptical pin holes.

[0013] Preferably, a pair of first ear seats that staggeredly penetrate the rectangular notches are fixedly provided on the outer ring surfaces of the pair of limiting rotating rings. A pair of second ear seats that are staggeredly distributed and movably hinged are provided at the outer ends of the pair of first ear seats. A pair of threaded cylinders distributed coaxially are fixedly provided at the outer ends of the pair of second ear seats. A double-threaded lead screw connected by threads is inserted between the pair of threaded cylinders.

[0014] Preferably, the engaging mechanism includes an L-shaped clamping plate. Four uniformly distributed U-shaped ear seats are fixedly arranged at the inner end of the outer side surface of the rectangular sleeve. A notched gear rotatably connected is arranged in the opening of each U-shaped ear seat, and an L-shaped clamping plate is fixedly arranged at the notched part of each notched gear.

[0015] Four uniformly distributed positioning through holes are formed at the outer end of the outer side surface of the rectangular sleeve. Four uniformly distributed second clamping grooves are formed in the outer side surface of the second clamping block. The outer end of each L-shaped clamping plate penetrates through the corresponding positioning through hole and abuts against the corresponding second clamping groove.

[0016] Preferably, a rotatably connected hollow sleeve is sleeved at the outer end of the fixed shaft. A concentrically fixed turntable is sleeved at the outer end of the hollow sleeve. A spiral-shaped engaging tooth is fixedly arranged on the outer side surface of the turntable, and the spiral-shaped engaging teeth are sequentially meshed and connected with the corresponding notched gears.

[0017] Preferably, a concentrically fixed worm gear ring is sleeved at the inner end of the hollow sleeve. A concentrically fixed hollow plate is sleeved at the inner end of the fixed shaft. A pair of L-shaped brackets are fixedly arranged at the top end of the hollow plate. A rotatably connected worm is arranged between the outer ends of the pair of L-shaped brackets. The worm is located directly above the worm gear ring, and the worm is meshed and connected with the worm gear ring.

[0018] Preferably, U-shaped brackets are fixedly arranged on both sides of the top and bottom of the vertical rod. A rotatably hinged U-shaped clamping plate is arranged in the opening of each U-shaped bracket. A closely meshed mesh plate is arranged parallel between adjacent pairs of vertical rods. Oval through holes are formed at the four corners of the closely meshed mesh plate. The outer end of each U-shaped clamping plate is clamped at the corresponding corner of the closely meshed mesh plate. The outer end of each U-shaped clamping plate is locked through the cooperation of a bolt and a nut, and the middle part of the bolt penetrates through the corresponding oval through hole.

[0019] The present invention also proposes an installation method for a closely meshed mesh structure of a disc-fastening external scaffolding, including the following steps:

[0020] Step 1, the first clamping block at the outer end of the vertical rod is inserted into the channel steel ring. By rotating the double-threaded lead screw, a pair of threaded cylinders are driven to move relatively closer, and then a pair of limit rotating rings are driven to rotate in a positive and reverse staggered manner through the second ear seat and the first ear seat;

[0021] Step 2, when the pair of limit rotating rings rotate in a staggered manner, through the limiting action formed by the limit pin shafts, the limit sliding plates are driven to slide inward along the rectangular sliding holes, so that the relative inner ends of the limit sliding plates abut against the corresponding first clamping grooves, forming a fixed lock on the vertical rod;

[0022] Step 3, the second clamping block at the outer end of the cross bar is inserted into the rectangular sleeve. By rotating the worm, the worm gear ring, the hollow sleeve, the turntable, and the spiral-shaped engaging teeth are driven to rotate synchronously;

[0023] Step 4: When the spiral-shaped engaging teeth rotate, the engagement between the spiral-shaped engaging teeth and the notched gear drives the notched gear and the L-shaped clamping plate to rotate hingedly, so that the outer ends of the L-shaped clamping plates all penetrate through the corresponding positioning through holes and abut against the corresponding second clamping grooves, forming a fixed locking of the cross bar.

[0024] Step 5: Repeat the above operations in sequence to install and fix a number of vertical bars, cross bars and connecting columns; and place a safety net panel between a pair of adjacent vertical bars, and the outer ends of the U-shaped clamping plates are all locked through the cooperation of bolts and nuts to fix the corners of the safety net panel, forming a fixed locking of the safety net panel.

[0025] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0026] 1. In the present invention, through the combined use of the limiting mechanism, the relative inner ends of the limiting sliding plates all abut against the corresponding first clamping grooves, forming a fixed locking of the vertical bars, which not only facilitates the quick installation and fixing of the vertical bars, but also enhances the stability of the fixing.

[0027] Through the combined use of the clamping mechanism, the outer ends of the L-shaped clamping plates all penetrate through the corresponding positioning through holes and abut against the corresponding second clamping grooves, forming a fixed locking of the cross bars, which not only facilitates the quick installation and fixing of the cross bars, but also enhances the stability of the fixing.

[0028] 2. In the present invention, a safety net panel is placed between a pair of adjacent vertical bars, and the outer ends of the U-shaped clamping plates are all locked through the cooperation of bolts and nuts to fix the corners of the safety net panel, forming a fixed locking of the safety net panel.

[0029] To sum up, the present invention solves the problems of unsafe factors existing in the disassembly process of the safety net of the disc buckle type scaffolding and low utilization rate caused by damage to the safety net, and the overall structure design is compact. The standardized, efficient and beautiful rigid safety net is used, which not only facilitates construction, greatly improves the construction efficiency, but also improves the utilization rate and safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The drawings described herein are used to provide a further understanding of the present invention, and constitute a part of this application. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0031] Figure 1 is the front view structural schematic diagram of the present invention;

[0032] Figure 2 is the overall installation structural schematic diagram of the present invention;

[0033] Figure 3Schematic diagram of the connection between a pair of vertical rods and a fine-mesh net plate of the present invention;

[0034] Figure 4 of the present invention Figure 3 explosion schematic diagram;

[0035] Figure 5 Schematic diagram of the connection between the connecting column of the present invention and a pair of vertical rods and four cross rods;

[0036] Figure 6 of the present invention Figure 5 explosion schematic diagram;

[0037] Figure 7 Schematic diagram of the connection between the connecting column of the present invention and a fixed ring and a pair of channel steel rings;

[0038] Figure 8 Schematic diagram of the connection between the vertical rod of the present invention and the channel steel ring;

[0039] Figure 9 of the present invention Figure 8 explosion schematic diagram;

[0040] Figure 10 Schematic diagram of the connection between the connecting column of the present invention and four cross rods;

[0041] Figure 11 Explosion schematic diagram of the cross rod and the connecting column of the present invention;

[0042] Figure 12 of the present invention Figure 11 schematic diagram of another perspective;

[0043] Numbers in the figure: 1, connecting column; 11, channel steel ring; 12, limit snap ring; 13, limit slide plate; 14, limit swivel ring; 15, threaded barrel; 16, double-threaded lead screw; 2, vertical rod; 21, first clamping block; 22, U-shaped clamping plate; 23, fine-mesh net plate; 3, fixed ring; 31, fixed shaft; 32, rectangular sleeve; 33, notched gear; 34, L-shaped clamping plate; 35, hollow sleeve; 36, worm gear ring; 37, turntable; 38, spiral-shaped clamping teeth; 39, hollow plate; 310, worm; 4, cross rod; 41, second clamping block. Detailed implementation manners

[0044] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0045] Embodiment 1: This embodiment provides a fine-mesh net structure for a disk-lock type external scaffolding. Refer to Figure 1-12, specifically, it includes several connecting columns 1. A pair of symmetrically distributed channel steel rings 11 are fixedly arranged at the upper and lower ends of the connecting column 1. A pair of vertical rods 2 are arranged on the outer sides of the pair of channel steel rings 11 facing away from each other. First clamping blocks 21 are fixedly arranged at both ends of each vertical rod 2. Each channel steel ring 11 is connected to the corresponding first clamping block 21 through a limiting mechanism;

[0046] A fixing ring 3 is sleeved on the middle part of the connecting column 1 and is concentrically fixedly connected. Four circularly arranged fixing shafts 31 are fixedly arranged on the outer ring surface of the fixing ring 3. A rectangular sleeve 32 is fixedly arranged at the outer end of each fixing shaft 31. A cross bar 4 is arranged on the outer side of the outer port of each rectangular sleeve 32. Second clamping blocks 41 are fixedly arranged at both ends of each cross bar 4. Each rectangular sleeve 32 is connected to the corresponding second clamping block 41 through a clamping mechanism.

[0047] In the specific implementation process, such as Figure 8 and Figure 9 As shown, the limiting mechanism includes a limiting clamping ring 12 and a limiting sliding plate 13. Four circularly arranged rectangular notches are opened on the outer ring surface of the channel steel ring 11. A concentrically fixedly connected limiting clamping ring 12 is arranged in the middle of the channel steel ring 11. The limiting clamping ring 12 is in the shape of a copper coin with a square inside and a circle outside. Four circularly arranged limiting sliding holes are opened on the outer ring surface of the limiting clamping ring 12. The limiting sliding holes correspond to the rectangular notches one by one;

[0048] A limiting sliding plate 13 connected by sliding is arranged inside each limiting sliding hole. Four uniformly distributed first clamping grooves are opened on the outer side surface of the first clamping block 21. The relatively inner ends of each limiting sliding plate 13 are abutted in the corresponding first clamping grooves; the limiting sliding plate 13 slides inward along the rectangular sliding hole, so that the relatively inner ends of the limiting sliding plate 13 are abutted in the corresponding first clamping grooves, forming the fixed locking of the vertical rod 2.

[0049] In the specific implementation process, such as Figure 8 and Figure 9 As shown, a pair of limiting rotating rings 14 are arranged on the upper and lower sides of the limiting clamping ring 12. The outer ring surfaces of the pair of limiting rotating rings 14 are rotatably connected to the inner ring surface of the channel steel ring 11. A pair of first elliptical pin holes are opened on the left and right sides of the top surface of the upper limiting rotating ring 14. A pair of second elliptical pin holes are opened on the front and rear sides of the top surface of the lower limiting rotating ring 14; U-shaped notches are opened on the left and right sides of the top surface and the front and rear sides of the bottom surface of the limiting clamping ring 12. Each U-shaped notch communicates with the corresponding limiting sliding hole;

[0050] A pair of U-shaped notches on the left and right sides correspond to a pair of first elliptical pin holes, and a pair of U-shaped notches on the front and rear sides correspond to a pair of second elliptical pin holes; a slidably connected limit pin is engaged inside each U-shaped notch, and the opposite ends of each limit pin are fixedly connected to the corresponding limit slide 13, and the top ends of the limit pins on the left and right sides are slidably inserted in the corresponding first elliptical pin holes, and the bottom ends of the limit pins on the front and rear sides are slidably inserted in the corresponding second elliptical pin holes; when a pair of limit swivels 14 rotate alternately, the limit slide 13 is driven to slide inward along the rectangular sliding hole through the limiting effect formed by the limit pins.

[0051] In the specific implementation process, Figure 11 and Figure 12 As shown, the clamping mechanism includes an L-shaped clamping plate 34, and four evenly distributed U-shaped ear seats are fixedly provided at the inner end of the outer side surface of the rectangular sleeve 32, and a notched gear 33 is rotatably connected in the opening of each U-shaped ear seat, and the notched part of each notched gear 33 is fixedly provided with an L-shaped clamping plate 34;

[0052] Four evenly distributed positioning through holes are formed on the outer end of the outer side surface of the rectangular sleeve 32, and four evenly distributed second card slots are formed on the outer side surface of the second card block 41. The outer end of each L-shaped card plate 34 passes through the corresponding positioning through hole and abuts against the corresponding second card slot; so that the outer end of the L-shaped card plate 34 passes through the corresponding positioning through hole and abuts against the corresponding second card slot, thereby fixing and locking the cross bar 4;

[0053] The outer end of the fixed shaft 31 is sleeved with a hollow sleeve 35 which is rotatably connected. The outer end of the hollow sleeve 35 is sleeved with a concentrically fixed turntable 37. The outer side surface of the turntable 37 is fixed with vortex-shaped teeth 38, which are meshed and connected with the corresponding notched gears 33 in turn; when the hollow sleeve 35 rotates, the hollow sleeve 35 drives the turntable 37 and the vortex-shaped teeth 38 to rotate synchronously, and the meshing action of the vortex-shaped teeth 38 and the notched gear 33 drives the notched gear 33 and the L-shaped clamping plate 34 to rotate in an articulated manner.

[0054] Embodiment 2: In embodiment 1, there is still the problem that the dense mesh plate 23 is inconvenient to install. Therefore, based on embodiment 1, this embodiment further includes:

[0055] In the specific implementation process, Figure 3 and Figure 4As shown in the figure, U-shaped brackets are fixedly installed on both sides of the top and bottom of the vertical rod 2. An actively hinged U-shaped clamping plate 22 is arranged inside the opening of each U-shaped bracket. A dense mesh plate 23 is placed parallel between a pair of adjacent vertical rods 2. Oval through holes are formed at the four corners of the dense mesh plate 23. The outer end of each U-shaped clamping plate 22 is clamped at the corresponding corner of the dense mesh plate 23. The outer end of each U-shaped clamping plate 22 is locked by the cooperation of a bolt and a nut, and the middle part of the bolt penetrates through the corresponding oval through hole; the dense mesh plate 23 is placed between a pair of adjacent vertical rods 2, and the outer ends of the U-shaped clamping plates 22 are locked by the cooperation of bolts and nuts to fix the corners of the dense mesh plate 23, forming a fixed lock on the dense mesh plate 23.

[0056] Embodiment 3: In Embodiment 2, there is still a problem that a pair of limiting rotating rings 14 cannot rotate. Therefore, on the basis of Embodiment 2, this embodiment further includes:

[0057] In the specific implementation process, as Figure 8 and Figure 9 shown, a pair of first ear seats that intersect and penetrate through rectangular notches are fixedly installed on the outer ring surface of a pair of limiting rotating rings 14. A pair of second ear seats that are staggeredly distributed and actively hinged are arranged at the outer ends of the pair of first ear seats. Threaded cylinders 15 that are coaxially distributed are fixedly installed at the outer ends of the pair of second ear seats. A double-threaded lead screw 16 that is threadedly connected is inserted between the pair of threaded cylinders 15; by rotating the double-threaded lead screw 16, the pair of threaded cylinders 15 are driven to approach relatively, and then the pair of limiting rotating rings 14 are driven to rotate in a positive and negative staggered manner through the second ear seats and the first ear seats.

[0058] Embodiment 4: In Embodiment 3, there is still a problem that the hollow sleeve 35 is inconvenient to rotate. Therefore, on the basis of Embodiment 3, this embodiment further includes:

[0059] In the specific implementation process, as Figure 11 and Figure 12 shown, a concentrically fixedly connected worm gear ring 36 is sleeved on the inner end of the hollow sleeve 35. A concentrically fixedly connected hollow plate 39 is sleeved on the inner end of the fixed shaft 31. A pair of L-shaped brackets are fixedly installed at the top end of the hollow plate 39. A rotatably connected worm 310 is arranged between the outer ends of the pair of L-shaped brackets. The worm 310 is located directly above the worm gear ring 36, and the worm 310 is meshed with the worm gear ring 36; by rotating the worm 310, the worm gear ring 36 and the hollow sleeve 35 are driven to rotate synchronously.

[0060] Embodiment 5: Specifically, the working principle and operation method of the present invention are as follows:

[0061] Step 1: The first clamping block 21 at the outer end of the vertical rod 2 is inserted into the channel steel ring 11, and the double-threaded screw 16 is rotated to drive a pair of threaded tubes 15 to move relatively close, and then the second ear seat and the first ear seat drive a pair of limit rotating rings 14 to rotate in a forward and reverse direction;

[0062] Step 2: When a pair of limiting swivels 14 rotate alternately, the limiting action formed by the limiting pin drives the limiting slide plate 13 to slide inward along the rectangular slide hole, so that the opposite inner ends of the limiting slide plate 13 are both against the corresponding first slots, thereby fixing and locking the vertical rod 2;

[0063] Step 3: The second clamping block 41 at the outer end of the crossbar 4 is inserted into the rectangular sleeve 32, and the worm gear 310 is rotated to drive the worm ring 36, the hollow sleeve 35, the rotating disk 37, and the vortex-shaped clamping teeth 38 to rotate synchronously;

[0064] Step 4: When the vortex-shaped latching teeth 38 rotate, the meshing action between the vortex-shaped latching teeth 38 and the notched gear 33 drives the notched gear 33 and the L-shaped latching plate 34 to hinge and rotate, so that the outer ends of the L-shaped latching plate 34 pass through the corresponding positioning through holes and abut against the corresponding second latching grooves, thereby fixing and locking the cross bar 4;

[0065] Step five, repeat the above operations in sequence to install and fix several vertical rods 2, horizontal rods 4 and connecting columns 1; and place a dense mesh panel 23 between an adjacent pair of vertical rods 2, and the outer ends of the U-shaped clamping plates 22 are locked by bolts and nuts to fix the corners of the dense mesh panel 23, thereby fixing and locking the dense mesh panel 23.

[0066] The present invention solves the problem of unsafe factors in the disassembly process of the dense mesh of the disc-type scaffolding and the low utilization rate caused by damage of the dense mesh. The overall structure is compactly designed and uses a standardized, efficient and beautiful rigid dense mesh, which not only facilitates construction and greatly improves construction efficiency, but also improves utilization and safety.

[0067] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A structure of a close-mesh net for a disk-button type external scaffolding, comprising a plurality of connecting columns (1), characterized in that: A pair of symmetrically distributed channel steel rings (11) are fixedly provided at the upper and lower ends of the connecting column (1). A pair of vertical rods (2) are provided on the outer sides of the pair of channel steel rings (11) facing away from each other. First clamping blocks (21) are fixedly provided at both ends of each vertical rod (2). Each channel steel ring (11) is connected to the corresponding first clamping block (21) through a limiting mechanism; A fixing ring (3) is concentrically and fixedly sleeved on the middle part of the connecting column (1). Four fixedly arranged fixing shafts (31) are provided on the outer ring surface of the fixing ring (3) in a circular arrangement. A rectangular sleeve (32) is fixedly provided at the outer end of each fixing shaft (31). A cross bar (4) is provided on the outer side of the outer port of each rectangular sleeve (32). Second clamping blocks (41) are fixedly provided at both ends of each cross bar (4). Each rectangular sleeve (32) is connected to the corresponding second clamping block (41) through a clamping mechanism; The limiting mechanism includes a limiting clamping ring (12) and a limiting sliding plate (13). Four rectangular notches are provided on the outer ring surface of the channel steel ring (11) in a circular arrangement. A limiting clamping ring (12) is concentrically and fixedly provided in the middle of the channel steel ring (11). The limiting clamping ring (12) is in the shape of a copper coin with a square inside and a circle outside. Four limiting sliding holes are provided on the outer ring surface of the limiting clamping ring (12) in a circular arrangement. The limiting sliding holes correspond to the rectangular notches one by one; A limiting sliding plate (13) is slidably connected inside each limiting sliding hole. Four evenly distributed first clamping grooves are provided on the outer side surface of the first clamping block (21). The relative inner ends of each limiting sliding plate (13) are abutted against the corresponding first clamping grooves; A pair of limiting rotating rings (14) are provided on the upper and lower sides of the limiting clamping ring (12). The outer ring surfaces of the pair of limiting rotating rings (14) are rotatably connected to the inner ring surface of the channel steel ring (11). A pair of first elliptical pin holes are provided on the left and right sides of the top surface of the upper limiting rotating ring (14). A pair of second elliptical pin holes are provided on the front and rear sides of the top surface of the lower limiting rotating ring (14); U-shaped notches are provided on the left and right sides of the top surface and the front and rear sides of the bottom surface of the limiting clamping ring (12). Each U-shaped notch communicates with the corresponding limiting sliding hole; A pair of U-shaped notches on the left and right sides correspond to a pair of first elliptical pin holes, and a pair of U-shaped notches on the front and rear sides correspond to a pair of second elliptical pin holes; A limiting pin shaft is slidably connected and clamped inside each U-shaped notch. The relative ends of each limiting pin shaft are fixedly connected to the corresponding limiting sliding plate (13). The top ends of the limiting pin shafts on the left and right sides are slidably inserted into the corresponding first elliptical pin holes, and the bottom ends of the limiting pin shafts on the front and rear sides are slidably inserted into the corresponding second elliptical pin holes; A pair of first ear seats are fixedly provided on the outer ring surfaces of the pair of limiting rotating rings (14) and penetrate through the rectangular notches in an alternating manner. A pair of second ear seats that are alternately distributed and movably hinged are provided at the outer ends of the pair of first ear seats. A pair of threaded cylinders (15) that are coaxially distributed are fixedly provided at the outer ends of the pair of second ear seats. A double-threaded lead screw (16) that is threadedly connected is inserted between the pair of threaded cylinders (15); The clamping mechanism comprises an L-shaped clamping plate (34), and four evenly distributed U-shaped ear seats are fixedly arranged at the inner end of the outer side surface of the rectangular sleeve (32), and a notched gear (33) rotatably connected is arranged in the opening of each of the U-shaped ear seats, and the notched portion of each of the notched gears (33) is fixedly arranged with an L-shaped clamping plate (34); The outer end of the outer side surface of the rectangular sleeve (32) is provided with four evenly distributed positioning through holes, the outer side surface of the second clamping block (41) is provided with four evenly distributed second clamping grooves, and the outer end of each L-shaped clamping plate (34) passes through the corresponding positioning through hole and abuts against the corresponding second clamping groove; The outer end of the fixed shaft (31) is sleeved with a rotatably connected hollow sleeve (35), the outer end of the hollow sleeve (35) is sleeved with a coaxially fixed rotating disk (37), the outer side surface of the rotating disk (37) is fixedly provided with vortex-shaped latching teeth (38), and the vortex-shaped latching teeth (38) are meshed and connected with the corresponding notched gears (33) in sequence; The inner end of the hollow sleeve (35) is sleeved with a coaxially fixed worm wheel ring (36), the inner end of the fixed shaft (31) is sleeved with a coaxially fixed hollow plate (39), the top end of the hollow plate (39) is fixed with a pair of L-shaped brackets, and a rotatably connected worm (310) is provided between the outer ends of the pair of L-shaped brackets, the worm (310) is located directly above the worm wheel ring (36), and the worm (310) is meshingly connected with the worm wheel ring (36).

2. The structure of the fine-mesh safety net for the button-connected external scaffolding according to claim 1, characterized in that: U-shaped brackets are fixedly provided on both sides of the top and bottom of the vertical rod (2), and a movable hinged U-shaped card plate (22) is provided in the opening of each of the U-shaped brackets. A dense mesh plate (23) placed in parallel is provided between an adjacent pair of vertical rods (2), and elliptical through holes are provided at the four corners of the dense mesh plate (23). The outer end of each of the U-shaped card plates (22) is clamped at the corresponding corner of the dense mesh plate (23), and the outer end of each of the U-shaped card plates (22) is locked by the cooperation of bolts and nuts, and the middle of the bolt passes through the corresponding elliptical through hole.

3. The installation method of a fine-mesh net structure for a socketed external scaffolding according to claim 2, characterized in that, The following steps are involved: Step 1: The first clamping block (21) at the outer end of the vertical rod (2) is inserted into the channel steel ring (11), and the double-threaded lead screw (16) is rotated to drive a pair of threaded tubes (15) to move relatively close, and then the second ear seat and the first ear seat are used to drive a pair of limit rotating rings (14) to rotate in a forward and reverse direction; Step 2: When a pair of limiting swivels (14) rotate alternately, the limiting action formed by the limiting pin shaft drives the limiting slide plate (13) to slide inward along the rectangular slide hole, so that the opposite inner ends of the limiting slide plate (13) are both against the corresponding first slots, thereby forming a fixed locking for the vertical rod (2); Step 3: The second clamping block (41) at the outer end of the crossbar (4) is inserted into the rectangular sleeve (32), and the worm gear (310) is driven to rotate synchronously with the worm ring (36), the hollow sleeve (35), the rotating disk (37), and the vortex-shaped clamping teeth (38); Step 4, when the spiral-shaped engaging teeth (38) rotate, the meshing action between the spiral-shaped engaging teeth (38) and the notched gear (33) drives the notched gear (33) and the L-shaped clamping plate (34) to perform articulated rotation, so that the outer ends of the L-shaped clamping plates (34) penetrate through the corresponding positioning through holes and abut against the corresponding second clamping grooves, forming a fixed locking of the cross bar (4). Step 5, repeat the above operations in sequence to install and fix a plurality of vertical bars (2), cross bars (4) and connecting columns (1); and place a wire mesh panel (23) between a pair of adjacent vertical bars (2), and the outer ends of the U-shaped clamping plates (22) are locked through the cooperation of bolts and nuts to fix the corners of the wire mesh panel (23), forming a fixed locking of the wire mesh panel (23).

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