Obstacle-crossing safety net supporting frame and using method thereof

Abstract

The invention relates to the technical field of safety protection equipment for high-altitude operation of an electric power iron tower, in particular to an obstacle-crossing safety net supporting frame and a using method thereof.The obstacle-crossing safety net supporting frame comprises four winches, a foldable supporting safety net bearing mechanism and fixing rod pieces, and the four winches are used for being installed in the four directions of the upper portion of the iron tower correspondingly; hooks are arranged at the free ends of winding ropes of the winches, and the hooks are connected with the foldable supporting safety net bearing mechanisms respectively so as to achieve lifting. The foldable supporting safety net bearing mechanism comprises an installation base used for being connected with an iron tower main material, a telescopic transverse frame capable of being adjusted in a telescopic mode is hinged to the installation base, and a movable rod capable of overturning around a hinge point is hinged to the rear end of the telescopic transverse frame. The two ends of the fixed rod piece are connected with movable rods of the foldable supporting safety net bearing mechanism respectively, and a gap is formed between the fixed rod piece and the iron tower. The safety net supporting frame is convenient to mount and reliable to fix, has an obstacle crossing function during lifting, and guarantees high-altitude operation safety and construction efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of power tower high-altitude operation safety protection equipment, and particularly relates to an obstacle-crossing safety net support frame and a use method thereof. BACKGROUND

[0002] With the rapid development of the power industry, the coverage of power transmission lines is continuously expanding, and the construction and maintenance operations of power towers are increasingly frequent. In high-altitude operations of power towers, workers face serious falling risks. According to statistics, high-altitude falling accidents account for more than 40% of safety accidents in the power industry, and tower operations account for 60% of high-altitude falling accidents. The problem of safety protection needs to be solved urgently.

[0003] As a commonly used protection equipment for high-altitude operations, the performance of the support frame of the safety net directly affects the protection effect. The safety net bearing mechanism on the market generally has the following technical defects: Firstly, the adaptability is poor, special components need to be customized for specific towers, which increases equipment costs and operation preparation time, and it is difficult to match different specifications and types of power tower main materials and inclined materials. Secondly, the installation is complex, professional tools and a long operation time are needed, and workers need to complete multi-step operations in high altitude, which prolongs the time of workers exposed to high-altitude dangerous environment and indirectly increases the risk of high-altitude operations. Thirdly, the firmness is insufficient, and there is a lack of effective clamping mechanism, which is easy to loosen and shift in strong winds and other bad weather, and the safety protection reliability is insufficient. Fourthly, the structure is not foldable, which occupies a large space and is inconvenient for transportation and storage, increasing the cost and difficulty of equipment transfer. Fifthly, the obstacle-crossing ability is missing, and when the construction height of the tower gradually increases, the existing support frame cannot be flexibly adjusted in height, or it is easy to scratch and hook with bolts, pegs and other obstacles on the tower during the adjustment process, increasing the difficulty of lifting and affecting the construction progress.

[0004] In view of the above technical defects of the prior art, there is an urgent need for a safety net support frame with obstacle-crossing function to meet the safety protection needs of modern power tower high-altitude operations. SUMMARY

[0005] The purpose of the present application is to provide a safety net support frame with obstacle-crossing function and a use method thereof, which is convenient to install, reliable to fix, has obstacle-crossing function when lifting, and guarantees the safety of high-altitude operations and construction efficiency.

[0006] The technical solution of this invention is as follows: a safety net support frame capable of overcoming obstacles, comprising winches, a foldable safety net support mechanism, and fixed rods. Four winches are installed at four locations on the upper part of the tower. Hooks are provided at the free ends of the winch ropes, and each hook is connected to a foldable safety net support mechanism for lifting. The foldable safety net support mechanism includes a mounting base for connecting to the main structure of the tower. A telescopic crossbeam is hinged to the mounting base, and a movable rod capable of rotating around the hinge point is hinged to the rear end of the telescopic crossbeam. Both ends of the fixed rods are connected to the movable rods of a foldable safety net support mechanism, forming a gap between the fixed rods and the tower.

[0007] Furthermore, the mounting base includes a connector for fitting the main material of the tower, and the upper and lower ends of the connector are respectively connected to a U-shaped clamp and a V-shaped base with openings facing forward.

[0008] Furthermore, the U-shaped clamp includes a V-shaped portion, the open end of which is connected to a clamping portion consisting of two parallel horizontal plates. Both sides of the V-shaped portion are provided with downwardly protruding connecting lugs, and the connecting lugs are provided with a plurality of bolt holes spaced apart for fastening to the tower. The front end of the horizontal plate is provided with a downwardly protruding triangular protrusion, and the triangular protrusion and the corresponding connecting lugs cooperate to form an avoidance groove.

[0009] Furthermore, the top of the V-shaped part is provided with a hinge groove and a connecting hole, and the front end of the telescopic crossbar has a horizontally arranged fork-shaped structure. The fork-shaped structure at the front end of the telescopic crossbar extends into the hinge groove and is hinged to the V-shaped part through a first vertical pin that passes through the connecting hole. The telescopic crossbar can rotate longitudinally within the range of 30° to 60° around the first vertical pin.

[0010] Furthermore, the V-shaped base is a horizontally arranged V-shaped steel plate, and the connector is a vertically arranged V-shaped angle steel with its opening facing forward. The upper and lower ends of the V-shaped angle steel are respectively welded to the corresponding U-shaped clamp and V-shaped base. The openings of the V-shaped base, the V-shaped angle steel, and the U-shaped clamp coincide in the vertical projection.

[0011] Furthermore, an oblique support is provided between the telescopic crossbeam and the connector. One end of the oblique support is welded to the middle of the telescopic crossbeam, and the other end of the oblique support is hinged to the lower part of the connector via a second vertical pin.

[0012] Furthermore, the rear end of the telescopic crossbeam has a vertically arranged fork-shaped structure, and the upper side of the front end and the upper and lower sides of the rear end of the movable rod are provided with hinge protrusions. The hinge protrusion at the front end of the movable rod extends into the fork-shaped structure and is hinged to the telescopic crossbeam via a longitudinal pin.

[0013] Furthermore, the fixed rod is a multi-segment rod with an overall zigzag structure, and both ends of the fixed rod have fixing holes; the front two sides of the movable rod are provided with trapezoidal protrusions, and multiple mounting holes are spaced apart on the trapezoidal protrusions. The mounting holes of the movable rod and the fixing holes of the fixed rod are connected by threaded sleeves and blind hole screws.

[0014] Furthermore, the telescopic crossbeam consists of two interlocking rods, one of which has multiple first positioning holes, and the other has a second positioning hole and a positioning pin that mates with the first positioning hole; the inner side of the fixed rod and the space between it and the tower and two adjacent telescopic crossbeams, as well as the outer side of the fixed rod and the space between it and two adjacent movable rods, are used for installing safety nets.

[0015] A method for using an obstacle-crossing safety net support frame includes the following steps: 1) Frame assembly: Assemble the mounting base, telescopic crossbar, and movable pole into a collapsible support safety net bearing mechanism, and assemble four sets of collapsible support safety net bearing mechanisms and place them in the four directions of the tower. A fixed rod is set between two adjacent retractable support safety net bearing mechanisms, and the two ends of the fixed rod are respectively connected to the front of the movable rod of the two adjacent retractable support safety net bearing mechanisms to form a ring support frame around the iron tower, ensuring that a uniform gap is formed between the fixed rod and the iron tower. 2) Winch installation; A winch is fixed at each of the four positions on the upper part of the tower, and the winch rope hangs freely without being tangled. 3) Frame hoisting Hook the hook at the free end of the winch's winding rope onto the middle of the telescopic crossbeam or the rear end of the movable pole of the corresponding foldable support safety net bearing mechanism; Four winches were started to operate synchronously to hoist the assembled frame consisting of the foldable support safety net bearing mechanism and fixed rods to the designated working height of the iron tower. 4) Frame fixation: Adjust the frame position to ensure the mounting base is securely fastened to the main tower structure, guaranteeing a firm and secure fixation. 5) Safety net installation: Safety nets are hung between the inside of the fixed poles and the tower, and between the outside of the fixed poles and the two adjacent movable poles, ensuring that the safety nets are taut and flat, and that the edges are tightly connected to the fixed poles and movable poles without any looseness or gaps. 6) Height adjustment and obstacle crossing: When the tower construction height needs to be increased and the frame needs to be lifted, loosen the fastening bolts between the mounting base and the tower, start the winch to pull the frame, and use the telescopic crossbeam to swing around the mounting base and the movable rod to rotate around the telescopic crossbeam, in conjunction with the gap between the fixed rod and the tower, to avoid obstacles on the tower. After the frame is lifted to the target height, tighten the mounting base again to complete the height adjustment.

[0016] Compared with the prior art, the present invention has the following advantages: 1. This obstacle-crossing safety net support frame solves the problems of poor adaptability, complex installation, unstable fixing, and easy scraping with obstacles during lifting of existing safety net support frames. It realizes flexible expansion and contraction, stable fixing, and obstacle-crossing function of the support frame. It is suitable for high-altitude work sites such as power towers and communication towers, providing stable support and efficient obstacle crossing for safety nets, ensuring the safety of high-altitude workers, and improving construction efficiency.

[0017] 2. Excellent obstacle-crossing function: The gap formed by the hinge between the fixed rod and the movable rod, combined with the avoidance groove of the U-shaped clamp, can effectively avoid obstacles such as bolts and foot nails on the tower during the frame lifting process, avoiding scraping and snagging, and reducing the difficulty of lifting operations; the telescopic crossbar can rotate around the vertical pin in the range of 30°~60°, and the hinge between the movable rod and the telescopic crossbar can be folded and unfolded, further improving the obstacle-crossing flexibility of the frame.

[0018] 3. High adaptability: The connecting lugs of the U-shaped clamp have multiple bolt holes, which can be adjusted according to the size of the main tower material to adapt to different specifications of towers; the V-shaped seat and the connector fit together to fit the main tower material, ensuring stable installation on different types of towers.

[0019] 4. Reliable Fixing: The mounting base is secured by connecting lug bolts of U-shaped clamps, which, together with the support and positioning of V-shaped seats, form a "clamping above and supporting below" fixed structure, enhancing the connection stability between the frame and the tower and resisting the impact of strong winds and other harsh environments; one end of the diagonal support arm is welded to the middle of the crossbar, and the other end is hinged to the connector, providing stable support for the crossbar and preventing deformation under stress.

[0020] 5. Convenient installation and transportation: The components are hinged by pins to achieve a foldable design. When not in use, they can be folded up to reduce space occupation and facilitate transportation and storage. The fixed rods have connecting holes at both ends, which can be quickly spliced ​​to form an overall frame. The installation process does not require complicated tools, improving work efficiency.

[0021] 6. Comprehensive protection: Multiple fixed poles are spliced ​​together and cooperate with movable poles to form a closed support structure around the tower, providing a stable installation carrier for the safety net. The gap between the fixed poles and the tower ensures obstacle crossing function without affecting the protection range, effectively preventing people and objects from falling. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the winch structure of the present invention; Figure 3 This is a schematic diagram of the foldable support safety net bearing mechanism of the present invention; Figure 4 This is a schematic diagram of the mounting base structure of the present invention; Figure 5 This is a cross-sectional view of the structure of the deployable support safety net bearing mechanism of the present invention; Figure 6 This is a schematic diagram of the crossbar structure of the present invention; Figure 7 This is a schematic diagram of the movable rod structure of the present invention; Figure 8 This is a schematic diagram of the fixing rod structure of the present invention; Figure 9 This is a schematic diagram of the obstacle-crossing safety net support frame of the present invention installed on a steel tower. In the diagram: a-Windmill; b-Foldable support safety net bearing mechanism; c-Fixed rod; 1-Motor; 2-Winding rope; 3-Hook; 4-Mounting base; 5-Telescopic crossbar; 6-Diagonal support; 7-Movable rod; 8-Hinge seat; 9-Bolt hole; 10-U-shaped clamp; 11-Connector; 12-V-shaped base; 13-V-shaped part; 14-Horizontal plate part; 15-Connecting ear plate; 16-Hinge groove; 17-Triangular protrusion; 18-Allowing groove; 19a-Fork-shaped structure; 19b-Fork-shaped structure; 20-Connecting hole; 21-Connecting block; 22-Hinge protrusion; 23-First vertical pin; 24-Trapezoidal protrusion; 25-Second vertical pin; 26-Fixing hole; 27-Mounting hole; 28-Limiting block. Detailed Implementation

[0023] To make the above features and advantages of the present invention more readily understood, specific embodiments are described below in conjunction with the accompanying drawings, but the present invention is not limited thereto.

[0024] refer to Figures 1 to 9 A safety net support frame capable of overcoming obstacles includes winches a, a deployable safety net support mechanism b, and fixed rods c. Four winches a are installed at four locations on the upper part of a steel tower. The free end of the winding rope 2 of each winch a is equipped with a hook 3, which is connected to one of the deployable safety net support mechanisms b for lifting. The deployable safety net support mechanism b includes a mounting base 4 for connecting to the main structure of the steel tower. A telescopic crossbeam 5 is hinged to the mounting base 4, and a movable rod 7 capable of rotating around the hinge point is hinged to the rear end of the telescopic crossbeam 5. Both ends of the fixed rods c are connected to the movable rods 7 of one of the deployable safety net support mechanisms b, forming a gap between the fixed rods c and the steel tower for obstacle avoidance.

[0025] In this embodiment, in order to achieve a better connection between the mounting base and the tower, the mounting base 4 includes a connector 11 for fitting the main material of the tower. The upper and lower ends of the connector 11 are respectively connected to a U-shaped clamp 10 with openings facing forward and a V-shaped base 12.

[0026] Specifically, the U-shaped clamp 10 includes a V-shaped portion 13. The open end of the V-shaped portion 13 is connected to a clamping portion consisting of two parallel horizontal plates 14. Both sides of the V-shaped portion 13 are provided with downwardly protruding connecting lugs 15. The connecting lugs 15 are provided with multiple bolt holes 9 spaced apart for fastening to the tower, thereby fastening to the tower with bolts through the bolt holes. The front end of the horizontal plate 14 is provided with a downwardly protruding triangular protrusion 17. The triangular protrusion 17 and the corresponding connecting lug 15 cooperate to form a clearance groove 18, so that the tower's inclined members are fitted into the clearance groove 18. The contour of the clearance groove 18 is adapted to the surface shape of the tower's inclined members, ensuring that the U-shaped clamp 10 fits tightly with the tower's inclined members and achieves reliable clamping.

[0027] In this embodiment, in order to connect the telescopic crossbar 5 with the mounting base 4, the top of the V-shaped part 13 is provided with a hinge groove 16 and a connecting hole 20. The front end of the telescopic crossbar 5 has a horizontally arranged fork-shaped structure 19a. The fork-shaped structure 19a at the front end of the telescopic crossbar 5 extends into the hinge groove 16 and is hinged to the V-shaped part 13 via a first vertical pin 23 passing through the connecting hole 20. Limiting blocks 28 are provided on the top 13 of the V-shaped part and on both sides of the hinge groove 16, so that the telescopic crossbar 5 can be longitudinally rotated within a range of 30° to 60° around the first vertical pin 23.

[0028] In this embodiment, in order to reduce costs and ensure that the connector 11, V-shaped base 12, and U-shaped clamp 10 fit tightly with the main tower material, the V-shaped base 12 is a horizontally arranged V-shaped steel plate, and the connector 11 is a vertically arranged V-shaped angle steel with its opening facing forward. The upper and lower ends of the V-shaped angle steel are welded to the corresponding U-shaped clamp 10 and V-shaped base 12, respectively. The openings of the V-shaped base 12, the V-shaped angle steel, and the U-shaped clamp 10 coincide in the vertical projection, so that the V-shaped surface of the main tower material can be embedded into the V-shaped base 12 and the U-shaped clamp and fit tightly with the connector 11.

[0029] In this embodiment, in order to improve the support strength of the telescopic crossbeam 5, an oblique support 6 is provided between the telescopic crossbeam 5 and the connector 11. One end of the oblique support 6 is welded to the middle part of the telescopic crossbeam 5, and the other end of the oblique support 6 is hinged to the hinge seat 8 at the lower part of the connector 11 via the second vertical pin 25, so that the telescopic crossbeam 5 and the oblique support 6 can rotate around the hinge point.

[0030] In this embodiment, to enable the movable rod 7 to rotate vertically around the telescopic crossbeam 5, the rear end of the telescopic crossbeam 5 has a vertically arranged fork-shaped structure 19b. The upper front side and the upper and lower rear sides of the movable rod 7 are each provided with a hinge protrusion 22. The hinge protrusion 22 at the front end of the movable rod 7 extends into the fork-shaped structure 19b and is hinged to the telescopic crossbeam 5 via a longitudinal pin. Simultaneously, the hinge protrusion 22 located on the upper end face of the movable rod 7 also helps to ensure that the movable rod 7 remains parallel to the telescopic crossbeam 5 after unfolding.

[0031] In this embodiment, both the fork-shaped structure 19a and the fork-shaped structure 19b are composed of two connecting blocks 21 with connecting holes 20, and are integrally formed with the movable rod 7.

[0032] In this embodiment, to improve the strength of the fixed rod c, the fixed rod c is a multi-segment rod with an overall zigzag structure. To connect the fixed rod c to the movable rod 7, both ends of the fixed rod c have fixing holes 26. The front sides of the movable rod 7 are provided with trapezoidal protrusions 24, each with a plurality of mounting holes 27 spaced apart. The mounting holes 27 of the movable rod 7 and the fixing holes 26 of the fixed rod c are connected by threaded sleeves and blind-hole screws, thereby ensuring connection strength.

[0033] In this embodiment, to ensure that the mounting base 4 can still connect to the main tower material after the foldable support safety net bearing mechanism b is raised in height, the telescopic crossbeam 5 adopts a telescopic and adjustable structure. Specifically, the telescopic crossbeam 5 includes two interlocking rods, one rod having multiple first positioning holes and the other rod having a second positioning hole, and a positioning pin for locking the first and second positioning holes together, thereby locking the crossbeam after length adjustment. The telescopic crossbeam is made of steel to ensure strength.

[0034] In this embodiment, safety nets are installed between the inner side of the fixed rod c and the tower and the two adjacent telescopic crossbeams 5, and between the outer side of the fixed rod c and the two adjacent movable rods 7, thereby improving safety.

[0035] A method for using an obstacle-crossing safety net support frame includes the following steps: 1. Frame assembly: (1) Assembly of mounting base 4: The connector 11 is set vertically, with the upper end welded with the U-shaped clamp 10 facing the front and the lower end welded with the V-shaped seat 12 facing the front, to ensure that the U-shaped clamp 10, connector 11 and V-shaped seat 12 are firmly connected, with the opening direction consistent and overlapping in the vertical projection, to ensure the fit with the main material of the iron tower. (2) Connection between telescopic crossbar 5 and U-shaped clamp 10: The fork-shaped structure 19a at the front end of the telescopic crossbar 5 is inserted into the hinge groove 16 at the rear end of the U-shaped clamp 10, and the two are hinged by the first vertical pin 23; the telescopic crossbar 5 can rotate around the first vertical pin 23 within a range of 30° to 60° to avoid excessive rotation affecting use; (3) Connection between movable rod 7 and telescopic crossbar 5: The hinge protrusion 22 at the front of movable rod 7 is inserted into the vertical fork-shaped structure 19b at the rear end of telescopic crossbar 5. The connection hole 20 of hinge protrusion 22 and connection hole 20 of fork-shaped structure 19b are connected through the longitudinal pin shaft to realize the hinge between movable rod 7 and crossbar 5, ensuring that movable rod 7 can be flexibly rotated around the longitudinal pin shaft. (4) Installation of the diagonal support 6: Weld one end of the diagonal support 6 to the middle position of the telescopic cross frame 5, and connect the other end to the pre-set hinge seat 8 at the bottom of the connector 11 through the second vertical pin 25, so that the angle of the diagonal support 6 can be adjusted synchronously with the rotation of the telescopic cross frame 5, providing continuous and stable support force for the telescopic cross frame 5. The above assembly forms a foldable support safety net bearing mechanism b, and four sets of foldable support safety net bearing mechanisms b are assembled and arranged in the four directions of the tower. (5) Assembly of fixed rod c: A fixed rod c is set between two adjacent foldable support safety net bearing mechanisms b, and the two ends of the fixed rod c are connected to the trapezoidal protrusions 24 at the front of the movable rods 7 of the two adjacent foldable support safety net bearing mechanisms b through threaded sleeves and blind hole screws, respectively, to form a ring support frame around the iron tower, ensuring that a uniform gap is formed between the fixed rod c and the iron tower.

[0036] 2. Installation of winch a; A winch 'a' is fixed at each of the four positions on the upper part of the tower to ensure that the installation position is symmetrical and firm, and that the winding rope 2 of winch 'a' hangs freely without being tangled.

[0037] 3. Frame hoisting Hook the hook 3 at the free end of the winding rope 2 of winch a onto the hinged protrusion 22 at the middle of the telescopic crossbeam 5 or the rear end of the movable rod 7 of the corresponding foldable support safety net bearing mechanism b. Start four winches (a) to operate synchronously, and hoist the assembled frame consisting of the deployable safety net support mechanism (b) and fixed rods (c) to the designated working height on the iron tower.

[0038] 4. Frame fixation: Adjust the frame position so that the U-shaped clamp 10 of the mounting base 4 fits against the main material of the iron tower. Align the clearance groove 18 of the U-shaped clamp 10 with the diagonal member or bolt position of the iron tower. Insert bolts through the bolt holes 9 on the connecting ear plate 15 to fasten the mounting base 4 to the main material of the iron tower, ensuring that it is firmly fixed and not loose.

[0039] 5. Safety net installation: Safety nets are hung between the inside of the fixed member c and the iron tower, and between the outside of the fixed member c and the two adjacent movable members 7, to ensure that the safety nets are taut and flat, and that the edges are tightly connected to the fixed member c and the movable members 7 without any looseness or gaps.

[0040] 6. Height Adjustment and Obstacle Clearing: When the tower construction height needs to be increased and the frame needs to be lifted, loosen the fastening bolts between the mounting base 4 and the tower, start the winch a to pull the frame, and use the telescopic crossbeam 5 to swing around the first vertical pin 23 and the movable rod 7 to rotate around the longitudinal pin, and use the gap between the fixed rod c and the tower to avoid obstacles such as bolts and foot nails on the tower. After the frame is lifted to the target height, tighten the mounting base 4 again to complete the height adjustment.

[0041] 7. Disassembly and storage: After the work is completed, first remove the safety net, then loosen the connecting bolts of the adjacent fixed rods c, separate the fixed rods c from the movable rods 7, and use winch a to hoist the foldable support safety net bearing mechanism b to the ground; loosen the second hinge pin 25 of the inclined support 6 and the connecting piece 11, and the first hinge pin 23 of the movable rod 7 and the telescopic crossbar 5, and fold and gather all the components for easy transportation and storage.

[0042] It is important to note that the implementation process must comply with the safety regulations for working at heights (such as GB / T 3608-2023): a warning zone must be set up on the ground, and non-operating personnel are prohibited from entering; operators must wear safety helmets, non-slip shoes, and other protective equipment. A regular inspection system should be established: check the hinge mechanism weekly to ensure it is flexible and not loose; check the corrosion condition of the bolts monthly, and apply anti-rust paint if necessary. Conduct an overall load test annually to ensure the safety performance of the mechanism.

[0043] The above description is only a preferred embodiment of the present invention. For those skilled in the art, designing different forms of obstacle-crossing safety net support frames and their usage methods according to the teachings of the present invention does not require creative labor. All equivalent changes, modifications, substitutions and variations made in accordance with the scope of the patent application of the present invention without departing from the principles and spirit of the present invention shall be covered by the present invention.

Claims

1. A safety net support frame capable of crossing obstacles, comprising a winch (a), a foldable and deployable safety net support mechanism (b), and fixed rods (c), characterized in that, Four winches (a) are installed at four locations on the upper part of the iron tower. The free end of the winding rope (2) of the winch (a) is provided with a hook (3). The hook (3) is connected to a foldable support safety net bearing mechanism (b) to achieve lifting. The foldable support safety net bearing mechanism (b) includes an installation base (4) for connecting with the main material of the iron tower. A telescopic crossbeam (5) that can be extended and adjusted is hinged on the installation base (4). The rear end of the telescopic crossbeam (5) is hinged with a movable rod (7) that can rotate around the hinge point. The two ends of the fixed rod (c) are connected to the movable rod (7) of the foldable support safety net bearing mechanism (b) respectively, and a gap is formed between the fixed rod (c) and the iron tower.

2. The obstacle-crossing safety net support frame according to claim 1, characterized in that, The mounting base (4) includes a connector (11) for fitting the main material of the iron tower. The upper and lower ends of the connector (11) are respectively connected to a U-shaped clamp (10) with openings facing forward and a V-shaped base (12).

3. The obstacle-crossing safety net support frame according to claim 2, characterized in that, The U-shaped clamp (10) includes a V-shaped part (13). The open end of the V-shaped part (13) is connected to a clamping part composed of two parallel horizontal plates (14). Both sides of the V-shaped part (13) are provided with downward protruding connecting lugs (15). The connecting lugs (15) are provided with a plurality of bolt holes (9) for fastening to the iron tower at intervals. The front end of the horizontal plate (14) is provided with a downward protruding triangular protrusion (17). The triangular protrusion (17) and the corresponding connecting lugs (15) cooperate to form an avoidance groove (18).

4. The obstacle-crossing safety net support frame according to claim 3, characterized in that, The top of the V-shaped part (13) is provided with a hinge groove (16) and a connecting hole (20). The front end of the telescopic crossbar (5) has a horizontally arranged fork-shaped structure (19a). The fork-shaped structure (19a) at the front end of the telescopic crossbar (5) extends into the hinge groove (16) and is hinged to the V-shaped part (13) through the first vertical pin (23) passing through the connecting hole (20). The telescopic crossbar (5) can swing longitudinally around the first vertical pin (23) in the range of 30° to 60°.

5. A safety net support frame capable of crossing obstacles according to claim 2, 3, or 4, characterized in that, The V-shaped base (12) is a horizontally arranged V-shaped steel plate, and the connector (11) is a vertically arranged V-shaped angle steel with its opening facing forward. The upper and lower ends of the V-shaped angle steel are welded to the corresponding U-shaped clamp (10) and V-shaped base (12) respectively. The openings of the V-shaped base (12), the V-shaped angle steel, and the U-shaped clamp (10) coincide in the vertical projection.

6. A safety net support frame capable of crossing obstacles according to claim 2, 3, or 4, characterized in that, An oblique support (6) is provided between the telescopic crossbeam (5) and the connector (11). One end of the oblique support (6) is welded to the middle of the telescopic crossbeam (5), and the other end of the oblique support (6) is hinged to the lower part of the connector (11) via a second vertical pin (25).

7. A safety net support frame capable of crossing obstacles according to claim 1, 2, 3 or 4, characterized in that, The telescopic crossbar (5) has a vertically arranged fork-shaped structure (19b) at its rear end. The upper side of the front end and the upper and lower sides of the rear end of the movable rod (7) are provided with hinge protrusions (22). The hinge protrusions (22) at the front end of the movable rod (7) extend into the fork-shaped structure (19b) and are hinged to the telescopic crossbar (5) via a longitudinal pin.

8. A safety net support frame capable of crossing obstacles according to claim 1, 2, 3 or 4, characterized in that, The fixed rod (c) is a multi-segment rod with an overall zigzag structure. Both ends of the fixed rod (c) have fixing holes (26). The front sides of the movable rod (7) are provided with trapezoidal protrusions (24). Multiple mounting holes (27) are provided on the trapezoidal protrusions (24) at intervals. The mounting holes (27) of the movable rod (7) and the fixing holes (26) of the fixed rod (c) are connected by threaded sleeves and blind hole screws.

9. The obstacle-crossing safety net support frame according to claim 1, characterized in that, The telescopic crossbeam (5) consists of two interlocking rods. One rod has multiple first positioning holes, and the other rod has a second positioning hole and a positioning pin that matches the first positioning hole. The inner side of the fixed rod (c) and the tower and the two adjacent telescopic crossbeams (5), as well as the outer side of the fixed rod (c) and the two adjacent movable rods (7), are used to install safety nets.

10. A method of using a safety net support frame capable of crossing obstacles as described in any one of claims 1 to 9, characterized in that, Includes the following steps: 1) Frame assembly: Assemble the mounting base (4), telescopic crossbar (5), and movable rod (7) into a foldable support safety net bearing mechanism (b), and assemble 4 sets of foldable support safety net bearing mechanisms (b) and arrange them in the four directions of the iron tower; A fixed rod (c) is set between two adjacent retractable support safety net bearing mechanisms (b), and the two ends of the fixed rod (c) are respectively connected to the front of the movable rod (7) of the two adjacent retractable support safety net bearing mechanisms (b) to form a ring support frame around the iron tower, ensuring that a uniform gap is formed between the fixed rod (c) and the iron tower. 2) Installation of the winch (a); A winch (a) is fixed at each of the four positions on the upper part of the iron tower. The winding rope (2) of the winch (a) hangs freely and is not tangled. 3) Frame hoisting Hook (3) at the free end of the winding rope (2) of the winch (a) to the middle of the telescopic crossbar (5) or the rear end of the movable rod (7) of the corresponding foldable support safety net bearing mechanism (b); Start four winches (a) to operate synchronously and hoist the assembled frame consisting of the foldable support safety net bearing mechanism (b) and fixed rods (c) to the designated working height of the iron tower; 4) Frame fixation: Adjust the frame position so that the mounting base (4) is firmly fixed to the main material of the iron tower, ensuring that it is secure and not loose; 5) Safety net installation: Safety nets are hung between the inside of the fixed member (c) and the iron tower, and between the outside of the fixed member (c) and the two adjacent movable members (7), to ensure that the safety nets are taut and flat, and that the edges are tightly connected to the fixed member (c) and the movable members (7) without any looseness or gaps. 6) Height adjustment and obstacle crossing: When the tower construction height needs to be increased and the frame needs to be lifted, loosen the fastening bolts between the mounting base (4) and the tower, start the winch (a) to pull the frame, and swing the telescopic crossbeam (5) around the mounting base (4) and rotate the movable rod (7) around the telescopic crossbeam (5) to avoid obstacles on the tower, and after the frame is lifted to the target height, tighten the mounting base (4) again to complete the height adjustment.

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