Anti-falling net device for construction of variable-diameter wind power tower drum

Abstract

According to the anti-falling net device for construction of the variable-diameter wind power tower drum, the size can be adjusted according to the change of the diameter of the tower drum, so that the anti-falling net device adapts to the change of the diameters of the inner walls of different tower drums or the inner walls of the same tower drum at different heights, and the universality is high. The variable-diameter wind power tower construction anti-falling net device comprises an anti-falling rope net and variable-side-length frame units arranged on the edge of the anti-falling rope net. The variable-side-length frame unit is of a polygonal structure formed by a plurality of telescopic pipes which are sequentially connected end to end through a plurality of corner nodes, and the side length of the polygonal structure can be adjusted through stretching and retracting of the telescopic pipes; the anti-falling rope net is laid on the surface of the variable side length frame unit, bypasses the variable side length frame unit and then is tensioned to form an elastic buffer layer.

Description

Technical Field

[0001] This invention relates to a fall protection net device, specifically a fall protection device for high-altitude operations during the installation of wind turbine tower sections, belonging to the field of wind energy equipment technology. Background Technology

[0002] To capture more wind energy, wind turbines often use concrete tower structures to increase the hub height. Compared to steel towers, concrete towers have more segments, resulting in longer working hours for workers during installation. To ensure the safety of workers at height, in addition to using personal fall protection equipment, fall protection nets are suspended 5-10 meters from the bottom of the tower.

[0003] However, existing fall protection nets often achieve their fall protection effect by binding elastic netting to steel pipe rings of fixed diameter. This traditional method has the following drawbacks:

[0004] 1. Fall protection nets have a fixed diameter structure, which cannot adapt to changes in the inner diameter of different towers and cannot achieve universality for multiple projects. This results in each type of tower needing to be equipped with a different fall protection net, increasing protection costs.

[0005] 2. When the working surface of the mixed tower installation is raised to more than 40m, the vertical distance between the fall protection net and the working surface is too large, causing the impact force of the fall to exceed the safety threshold, greatly reducing the protective effect, or even causing it to fail. If it is necessary to keep the distance between the fall protection net and the working surface within a safe value, the fall protection net needs to be replaced with steel pipe rings of different diameters. The replacement process requires lifting out the temporary construction platform and then fixing the fall protection net with bolts. This repeated disassembly and assembly increases the risk of high-altitude operations and the construction period cost. Summary of the Invention

[0006] In view of this, the present invention provides a variable diameter wind turbine tower construction anti-fall net device, which can adjust its size according to the change of tower diameter, thereby adapting to the change of inner wall diameter of different towers or different heights of the same tower, and has strong versatility.

[0007] The technical solution of the present invention is: a variable diameter wind turbine tower construction anti-fall net device, comprising: an anti-fall rope net and a variable side length frame unit disposed at the edge of the anti-fall rope net;

[0008] The variable side length frame unit is a polygonal structure formed by multiple telescopic tubes that are connected end to end by several corner nodes. The side length of the polygonal structure can be adjusted by the extension and retraction of the telescopic tubes.

[0009] The fall arresting rope net is laid on the surface of the variable side length frame unit, and after passing around the variable side length frame unit, it is tightened to form an elastic buffer layer.

[0010] As a preferred mode of the present application: the telescopic pipe comprises coaxially nested outer pipe and inner pipe, one end of the outer pipe is welded with the corner node of the corresponding end, the other end is coaxially sleeved outside the inner pipe, the other end of the inner pipe is welded with the corner node of the corresponding end; the inner pipe can be telescoped relative to the outer pipe.

[0011] As a preferred mode of the present application: the outer surface of the inner pipe is provided with a plurality of adjusting holes along the axial direction, and the outer pipe is provided with locking holes matched with the adjusting holes.

[0012] As a preferred mode of the present application: the edge of the fall arrest net is circumferentially spaced apart a plurality of hooks, and the fall arrest net is pulled tight by hooking the hooks at the preset position after winding around the variable side length frame unit.

[0013] As a preferred mode of the present application: one side of the variable side length frame unit is provided with a ladder gap.

[0014] As a preferred mode of the present application: the variable side length frame unit is a 12-sided polygon, comprising 12 telescopic pipes connected in sequence by a plurality of corner nodes.

[0015] As a preferred mode of the present application: the variable side length frame unit is circumferentially provided with a plurality of hanging points, one end of the steel rope is connected to the hanging point, and the other end is bound to the reserved hanging point on the inner wall of the tower.

[0016] Beneficial effects:

[0017] (1) The present application changes the form of the traditional fall arrest net which cannot be changed in diameter, and can adjust the diameter of the fall arrest net by setting the variable side length frame unit, solves the problem of difficult installation of different diameter tower, and the problem of high altitude fall failure caused by the fact that the fall arrest net cannot be lifted synchronously with the work platform in the process of wind power tower construction.

[0018] (2) In the present application, a plurality of double nested steel pipes are used in the variable side length frame unit to form a multi-deformation structure, and the diameter of the fall arrest net is adjusted by adjusting the side length of the polygonal structure, and the adjustment process is simple and efficient.

[0019] (3) In the present application, equidistant adjusting holes are opened in the pipe wall to realize diameter adjustment, and a plurality of equidistant adjusting holes can realize step-by-step change of the diameter of the fall arrest net, and the adaptability to the change of the inner wall of the tower is stronger.

[0020] (4) The fall arrest net device in the present application can be lifted step by step in the variable diameter tower, which ensures the effective distance between the work platform and the fall arrest net, greatly improves the fall arrest effect, and saves the construction period cost. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1The overall planar schematic diagram of the anti-falling net device of the present application;

[0022] Figure 2 The schematic diagram of the telescopic edge adjustment process;

[0023] Figure 3 The detailed structure diagram of the locking hole;

[0024] Figure 4 The schematic diagram of the rope net tensioning;

[0025] Figure 5 The schematic diagram of the anti-falling net device of the present application in the tower drum lifting.

[0026] Wherein: 1 - corner node; 2 - outer tube; 3 - inner tube; 4 - ladder gap; 5 - anti-falling rope net; 6 - hook; 7 - locking bolt; 8 - adjustment hole. DETAILED DESCRIPTION

[0027] The present application will be further described in detail below in combination with the drawings and examples.

[0028] The present embodiment provides a variable-diameter wind power tower drum construction anti-falling net device, which can adapt to the change of the inner wall diameter of the tower drum, and can be set at any position in the tower drum, thereby ensuring the effective distance between the work platform and the anti-falling net, greatly improving the anti-falling effect, and saving the construction period cost.

[0029] As shown in Figure 1 , the anti-falling net device comprises: an anti-falling rope net 5 and a variable edge length frame unit arranged at the edge of the anti-falling rope net 5; the variable edge length frame unit adopts a polygonal steel pipe frame capable of dynamically adjusting the edge length, realizing continuous change of the diameter, thereby adjusting the originally fixed circular ring structure anti-falling net into a variable edge length frame type; a locking hole is arranged on each frame edge, and after adjustment is completed, a bolt is used for fixation.

[0030] Specifically: the variable edge length frame unit comprises a plurality of telescopic pipes connected in sequence by a plurality of corner nodes 1, thereby forming a polygonal structure. The telescopic pipe comprises a coaxially nested outer tube 2 and an inner tube 3, one end of the outer tube 2 is welded with the corresponding end corner node 1, the other end is coaxially sleeved outside the inner tube 3, and the other end of the inner tube 3 is welded with the corresponding end corner node 1. The inner tube 3 can be telescoped relative to the outer tube 2. A plurality of adjustment holes 8 are arranged on the outer surface of the inner tube 3 in the axial direction, and a locking hole is arranged on the outer tube 2 matched with the adjustment hole 8. The telescoping of the inner tube 3 relative to the outer tube 2 realizes step-by-step adjustment of the edge length (i.e. the length of the telescopic pipe), and after adjustment is completed, a fixing bolt 7 is used to pass through the locking hole and the corresponding position adjustment hole 8, realizing locking, as shown in Figure 2 and Figure 3 .

[0031] As an example, the variable side length frame unit is a 12-agon, including 12 telescopic pipes connected in order by several corner nodes 1. The corner nodes 1 and the outer pipe 2 and the inner pipe 3 are all steel pipes, the corner nodes 1 have a diameter of about 160 mm, and are connected to the telescopic pipes on both sides by welding; the outer pipe 2 has a diameter of 100 mm, and the inner pipe 3 has a diameter of 80 mm; the inner pipe 3 is provided with 7-10 adjusting holes 8 (positioning pin holes) of Ф12 mm along the axial direction, and the outer pipe 2 is provided with a locking hole of the same diameter. Preferably, the several adjusting holes 8 are distributed at equal intervals.

[0032] The fall arrest rope net 5 is laid on the surface of the variable side length frame unit to form an elastic buffer layer; as an example, the fall arrest rope net 5 uses a polyester fiber rope net. In use, the size of the variable side length frame unit is first adjusted according to the diameter of the inner wall of the tower drum at the installation position of the fall arrest net, that is, the length of each side of the variable side length frame unit is adjusted by the telescopic pipes, and after the assembly and adjustment of the variable side length frame unit are completed, the rope net 5 laid on the surface thereof is pulled tight.

[0033] As an example, the edges of the fall arrest rope net 5 are circumferentially spaced apart by several hooks 6; when the inner diameter of the variable side length frame unit is reduced, the edges of the fall arrest rope net 5 are pulled tight after passing around the telescopic pipes; then the hooks 6 are hooked to the fall arrest rope net 5 from the lower part of the rope net to maintain the tension, so as to achieve the elastic buffering effect; as shown in Figure 4 The hooks 6 can also be hooked to other places such as the hanging points on the inner wall of the tower drum, as long as the fall arrest rope net 5 can be pulled tight.

[0034] In use, the fall arrest net device is hung on the reserved hanging points on the inner wall of the tower drum by steel ropes, as shown in Figure 5 The variable side length frame unit is circumferentially provided with several hanging points (such as one hanging point on each corner node 1), one end of the steel rope is connected to the hanging point, and the other end is bound to the reserved hanging point on the inner wall of the tower drum.

[0035] As shown in Figure 5 Since the size of the variable side length frame unit in the fall arrest net device is adjustable, it can be arranged at any position in the tower drum, that is, it can be synchronously lifted with the working platform during the construction of the wind power tower, so as to ensure the effective distance between the working platform and the fall arrest net and improve the fall arrest effect.

[0036] Further, in order not to interfere with the normal use of the ladder on the inner wall of the tower drum, a ladder gap 4 is arranged on one side of the variable side length frame unit, specifically, one side length of the variable side length frame unit is removed, a concave structure is arranged, and a gap is formed as the ladder gap 4; as an example, the ladder gap 4 is an open structure formed by welding three steel pipes, and the open sides are connected to the corresponding corner nodes 1 by welding. By arranging the ladder gap 4, the fall arrest net can be normally lifted in the case that the ladder on the inner wall of the tower drum has been installed.

[0037] The overall lifting of the fall protection net device in the tower drum is assisted by a crane, and after being lifted to a set position, one end of a steel rope is bound to the fall protection net, and the other end is bound to a reserved hanging point on the inner wall of the tower drum.

[0038] Although the present application has been described in detail with general description and specific embodiments above, some modifications or improvements can be made on the basis of the present application, which is obvious to those skilled in the art. Therefore, these modifications or improvements made on the basis of not deviating from the spirit of the present application shall fall within the scope of the present application.

Claims

1. A variable-diameter wind power tower cylinder construction anti-falling net device, characterized in that, The utility model relates to a variable side length framework unit and a fall arrest net, and belongs to the technical field of fall arrest net. The utility model relates to a variable side length framework unit and a fall arrest net, and belongs to the technical field of fall arrest net. The utility model relates to a variable side length framework unit and a fall arrest net, and belongs to the technical field of fall arrest net. The utility model relates to a variable side length framework unit and a fall arrest net, and belongs to the technical field of fall arrest net.

2. The variable diameter wind power tower construction fall arrest net system of claim 1, wherein, The utility model relates to a variable side length framework unit and a fall arrest net, and belongs to the technical field of fall arrest net.

3. The variable diameter wind power tower construction fall arrest net system of claim 2, wherein, The utility model relates to a variable side length framework unit and a fall arrest net, and belongs to the technical field of fall arrest net.

4. The variable diameter wind turbine tower section construction fall arrest net system of any one of claims 1-3, wherein, The utility model relates to a variable side length framework unit and a fall arrest net, and belongs to the technical field of fall arrest net.

5. The variable diameter wind turbine tower section construction fall arrest net system of any one of claims 1-3, wherein, The utility model relates to a variable side length framework unit and a fall arrest net, and belongs to the technical field of fall arrest net.

6. The variable diameter wind turbine tower section construction fall arrest net system of any one of claims 1-3, wherein, The utility model relates to a variable side length framework unit and a fall arrest net, and belongs to the technical field of fall arrest net.

7. The variable diameter wind turbine tower section construction fall arrest net system of any one of claims 1-3, wherein, The utility model relates to a variable side length framework unit and a fall arrest net, and belongs to the technical field of fall arrest net. The utility model relates to a variable side length framework unit and a fall arrest net, and belongs to the technical field of fall arrest net. The utility model relates to a variable side length framework unit and a fall arrest net, and belongs to the technical field of fall arrest net. The utility model relates to a variable side length framework unit and a fall arrest net, and belongs to the technical field of fall arrest net. The utility model relates to a variable side length framework unit and a fall arrest net, and belongs to the technical field of fall arrest net. The utility model relates to a variable side length framework unit and a fall arrest net, and belongs to the technical field of fall arrest net. The utility model relates to a variable side length framework unit and a fall arrest net, and belongs to the technical field of fall arrest net. The utility model relates to a variable side length framework unit and a fall arrest net, and belongs to the technical field of fall arrest net. The utility model relates to a variable side length framework unit and a fall arrest net, and belongs to the technical field of fall arrest net. The utility model relates to a variable side length framework unit and a fall arrest net, and belongs to the technical field of fall arrest net. The utility model relates to a variable side length framework unit and a fall arrest net, and belongs to the technical field of fall arrest net. The utility model relates to a variable side length framework unit and a fall arrest net, and belongs to the technical field of fall arrest net. The utility model relates to a variable side length framework unit and a fall arrest net, and belongs to the technical field of fall arrest net. The utility model relates to a variable side length framework unit and a fall arrest net, and belongs to the technical field of fall arrest net. The utility model relates to a variable side length framework unit and a fall arrest net, and belongs to the technical field of fall arrest net. The utility model relates to a variable side length framework unit and a fall arrest net, and belongs to the technical field of fall arrest net. The utility model relates to a variable side length framework unit and a fall arrest net, and belongs to the technical field of fall arrest net. The utility model relates to a variable side length framework unit and a fall arrest net, and belongs to the technical field of fall arrest net. The utility model relates to a variable side length framework unit and a fall arrest net, and belongs to the technical field of fall arrest net. The utility model relates to a variable side length framework unit and a fall arrest net, and belongs to the technical field of fall arrest net. The utility model relates to a variable side length framework unit and a fall arrest net, and belongs to the technical field of fall arrest net. The utility model relates to a variable side length framework unit and a fall arrest net, and belongs to the technical field of fall arrest net. The utility model relates to a variable side length framework unit and a fall arrest net, and belongs to the technical field of fall arrest net. The utility model relates to a variable side length framework unit and a fall arrest net, and belongs to the technical field of fall arrest net. The utility model relates to a variable side length framework unit and a fall arrest net, and belongs to the technical field of fall arrest net. The utility model relates to a variable side length framework unit and a fall arrest net, and belongs to the technical field of fall arrest net. The utility model relates to a variable side length framework unit and a fall arrest net, and belongs to the technical field of fall arrest net.

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