Anti-ice-falling carbon fiber protective net device for large-span power transmission tower

Abstract

The invention discloses an anti-icing carbon fiber protective net device for a long-span power transmission tower. The anti-icing carbon fiber protective net device comprises a carbon fiber woven protective net, an insulating supporting structure and a suspension cable connecting system. The protective net body is formed by weaving carbon fiber materials and has the advantages of being light in weight, high in strength, resistant to corrosion and the like, and the surface of the protective net body is covered with the super-hydrophobic ice and snow resisting coating so that ice and snow accumulation and secondary icing can be prevented; the insulating support structure can effectively guarantee the electrical safety of the device; the suspension cable connecting system is used for installing the protective net on a cross arm or a tower body of the power transmission tower, and stable hanging and position adjustment of the net face are achieved. When falling ice impacts the protective net, the protective net intercepts the falling ice through the bearing capacity of the carbon fiber material and prevents secondary icing through the super-hydrophobic coating, and direct impact of ice blocks on the ground is avoided. The device is simple in design, convenient to install and maintain, suitable for various complex terrains and capable of effectively preventing the large-span power transmission tower from falling ice from damaging personnel, equipment and facilities.

Description

Technical Field

[0001] The invention belongs to the technical field of power transmission tower protection devices, and in particular relates to a carbon fiber protection net device for preventing ice from falling on a large-span transmission tower. Background Art

[0002] With the continuous improvement of energy infrastructure and the rapid development of power systems, in order to meet the needs of long-distance power transmission and crossing complex terrain, the height of large transmission towers has continued to rise, and has now reached an astonishing height of 371 meters. This increase in height has brought many challenges to the construction of transmission towers, such as the extension of the construction period. Since the air temperature at high altitudes is significantly lower than that on the ground, water vapor is easy to condense at high altitudes, so transmission towers are prone to ice in winter. When ice ridges are formed after ice is covered, the risk of ice falling increases significantly.

[0003] If large-span transmission towers are covered with ice in winter, it will not only increase the weight of the structure, but may also cause the tower to collapse or the transmission line to break, posing a great safety threat to surrounding residential areas and industrial facilities. Falling ice ridges may even hit pedestrians or buildings at the bottom, causing serious personal injury and property damage.

[0004] In order to meet this challenge, a variety of de-icing and anti-icing technologies have been gradually developed, such as direct current ice melting, mechanical de-icing, drone flame de-icing, laser de-icing, etc.

[0005] Mechanical deicing is a commonly used method for controlling ice on transmission towers. This method has low safety and deicing efficiency and is prone to damage to power facilities. However, existing deicing methods are difficult to prevent ice from falling off during the deicing process, which can harm ground personnel and buildings. Effective control and protection measures for ice falling on transmission towers are still lacking. The main problems to be solved include:

[0006] (1) The falling of ice from the cross arms and high-altitude poles of ultra-high transmission towers poses a huge threat to the safety of people and property near the bottom. It is urgent to develop measures to control and protect against falling ice to prevent it from causing harm to the ground.

[0007] (2) The safety and efficiency of existing de-icing methods need to be improved, and they are prone to cause damage to power facilities.

[0008] Therefore, it is necessary to develop an ice falling protection device during the construction phase of a transmission tower to solve the above problems. Summary of the invention

[0009] In order to solve the above problems, the present invention discloses a carbon fiber protective net device for preventing ice from falling on large-span transmission towers. The device has a double-layer design of a carbon fiber net and an anti-ice and snow coating, has good load-bearing, buffering and anti-icing effects, and can effectively protect transmission towers from falling ice at high altitudes.

[0010] To achieve the above object, the technical solution of the present invention is as follows:

[0011] A carbon fiber protective net device for preventing ice falling on a large-span transmission tower comprises a carbon fiber woven protective net, an insulating support structure and a suspension cable connection structure; the insulating support structure is located around the carbon fiber woven protective net and is movably connected to the carbon fiber woven protective net. A stabilizing cable is arranged on the outside of the insulating support structure and connected to the tower body to improve the wind resistance stability of the protective net; the suspension cable connection structure suspends the protective net on the cross arm of the transmission tower. The carbon fiber woven protective net has a double-layer design, which improves the load-bearing capacity, and the surface is covered with a super-hydrophobic anti-ice and snow coating, which can prevent ice and snow accumulation and secondary icing. The device is fixedly connected to the cross arm or tower body of the transmission tower through the suspension cable, and the suspension height can be flexibly adjusted to ensure the stability of the net surface. When falling ice hits the protective net, the carbon fiber woven protective net absorbs the impact force through the elasticity of the carbon fiber material and the super-hydrophobic coating, avoiding direct impact of ice on the ground. The insulating support structure ensures the electrical safety of the device in the high-voltage transmission tower environment, and the device is simple in design and easy to install and maintain.

[0012] Preferably, the carbon fiber woven protective net is woven from carbon fiber material, has the advantages of high strength, corrosion resistance, light weight, etc., and can maintain stability under adverse weather conditions.

[0013] Preferably, the surface of the carbon fiber woven protective net is covered with a super hydrophobic anti-ice and snow coating, which can maintain its hydrophobic properties in extremely low temperature environments, prevent ice and snow from accumulating on the carbon fiber woven protective net and reduce the adhesion time of moisture, further improving the device's anti-ice and snow performance and self-cleaning ability.

[0014] Preferably, the insulating support structure is made of multi-layer composite insulating materials. The support structure not only has high strength, but also provides excellent electrical insulation performance to ensure the electrical safety of the device in a high-voltage environment and prevent conductivity problems. The support structure is also corrosion-resistant and weather-resistant to adapt to long-term outdoor environments. Windproof slots are designed around the insulating support structure to reduce the impact of wind pressure on the device.

[0015] Preferably, the cable connection structure includes a high-voltage resistant cable and an adjustment buckle at the end. The cable fixes the protective net on the transmission tower by a multi-point fixing method. The adjustment buckle is used to flexibly adjust the height and tension of the protective net, so that the device can adapt to different transmission tower heights and different terrain conditions; a tensioning device is provided on the cable, which can be adjusted to be loose or tight according to the load-bearing conditions of the protective net.

[0016] Preferably, the connection parts of the carbon fiber woven protective net adopt a quick-release buckle design. The quick-release buckle design makes the installation and removal of the protective net more convenient, reduces construction time, and facilitates the rapid replacement or maintenance of the protective net in bad weather or emergency situations.

[0017] Preferably, the cable connection structure is connected to the carbon fiber woven protective net through high-strength bolts and embedded pre-embedded nuts. The embedded pre-embedded nuts in the carbon fiber woven protective net provide a solid connection foundation, effectively preventing the bolts from falling off or the connection from loosening, and is suitable for complex climatic conditions and high-load environments.

[0018] By constructing the function of the manufacturing cost F of the carbon fiber protective net with respect to the volume V of the protective net, the optimal design parameters of the protective net are obtained to ensure the optimal combination of material utilization efficiency and structural strength while meeting the requirements of the carrying capacity and impact resistance of the protective net; where t and d are the unit thickness and unit grid size, respectively; w t With w d are the cost coefficients per unit thickness and per unit mesh size respectively; then the manufacturing cost F of the carbon fiber protective net as a function of the volume V of the protective net is:

[0019] minF={w t ,w d d}

[0020] In order to ensure the performance of the carbon fiber protective net in terms of wind load resistance, load bearing and elasticity, the thickness t and mesh size d should meet the following constraints:

[0021]

[0022] Where, σ, ε and disp are the maximum stress, maximum strain and total deformation of the carbon fiber protective net respectively; σ max ,∈ max and lim are the maximum allowable stress, maximum allowable strain and total allowable deformation, respectively.

[0023] The beneficial effects of the present invention are:

[0024] 1. The present invention forms an efficient ice protection system by combining the main body of the carbon fiber woven protection net with the insulating support structure. The carbon fiber material has high strength, light weight and tensile strength, and can withstand the large amount of ice and snow load generated on the large-span transmission tower;

[0025] 2. The surface of the carbon fiber woven protective net is coated with super-hydrophobic anti-ice and snow, which greatly reduces the accumulation and adhesion of ice and snow on the net surface. By reducing the surface energy, it prevents the secondary freezing of water and ice and snow, ensuring that the protective net always remains lightweight and does not add excessive load. The self-cleaning effect of the coating also extends the service life of the device, reduces the maintenance frequency, and improves the reliability of the system under extreme climatic conditions;

[0026] 3. The device of the present invention adopts a suspension cable connection structure. Through the adjustment buckle and quick-release buckle design, the carbon fiber woven protective net can be quickly installed and disassembled to adapt to various transmission tower structures and different terrain conditions. The tensioning device and adjustment node on the suspension cable ensure that the carbon fiber woven protective net can flexibly adjust the height and angle to adapt to different climates and changes in ice and snow loads, effectively improving the protection range of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural diagram of an embodiment of the present invention.

[0028] Figure 2 This is a top view of the carbon fiber woven protective net device.

[0029] Figure 3 This is the front view of the carbon fiber woven protective net device.

[0030] Figure 4 for Figure 1 Section II.

[0031] Figure 5 Detailed diagram of the connection between the cable connection structure and the carbon fiber woven protective net.

[0032] Figure 6 This is the embedded nut diagram.

[0033] List of Figure Symbols:

[0034] 1-1. Insulation support structure; 1-2. Carbon fiber woven protective net; 3. Stabilizing rope; 4. Suspension cable connection structure; 5. Adjustment lock buckle; 6. Embedded pre-embedded nut; 7. Carbon fiber material; 8. Super hydrophobic anti-ice and snow coating. DETAILED DESCRIPTION

[0035] The present invention will be further explained below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the following specific embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention.

[0036] As shown in the figure, a carbon fiber protective net device for preventing ice falling on a large-span transmission tower described in the present invention includes a carbon fiber woven protective net 1-2, an insulating support structure 1-1 and a suspension cable connection structure 4; the insulating support structure 1-1 is located around the carbon fiber woven protective net 1-2 and is movably connected to the carbon fiber woven protective net 1-2, a stabilizing cable 3 is provided on the outside of the insulating support structure 1-1 and is connected to the tower body, and a suspension cable connection structure 4 is provided on the outside of the insulating support structure 1-1.

[0037] Here’s how to use it:

[0038] Step 1: Utilize the cable connection structure 4 and fasten it to the cross arm of the transmission tower. The carbon fiber woven protective net is hung parallel to the bottom of the wire. The best attachment point of the suspension connection structure on the cross arm should consider factors such as structural integrity, accessibility and load distribution. The cable connection structure 4 is securely attached to the tower using appropriate fasteners and potential additional structural support depending on the tower design and the selected cable connection structure 4. This ensures stability and load-bearing capacity. The adjustment lock 5 should facilitate adjustment.

[0039] Step 2: Check the carbon fiber woven protective mesh 1-2 to ensure that the carbon fiber material 7 is intact and the super hydrophobic anti-ice and snow coating 8 on the surface is uniform; integrate the insulating support structure 1-1. The insulating support structure 1-1 should be carefully placed around the perimeter of the carbon fiber woven protective mesh 1-2 and ensure sufficient spacing to prevent contact with the high-voltage components of the transmission tower. Use the provided quick-release clips or other fastening mechanisms to secure the insulating support structure 1-1 to the carbon fiber woven protective mesh 1-2. Ensure a firm and reliable connection. Check the electrical insulation performance of the connection point.

[0040] Step 3: Connect the carbon fiber woven protective net 1-2 to the suspension cable connection structure 4. Use high-strength bolts and embedded pre-embedded nuts 6 to fix the suspension cable to the carbon fiber woven protective net. The embedded pre-embedded nuts 6 are embedded in the carbon fiber woven protective net 1-2, and the suspension cable connection structure 4 is firmly connected to the carbon fiber woven protective net 1-2 through high-strength bolts. Use the adjustment lock 5 on the suspension cable connection structure 4 to carefully adjust the tension of the carbon fiber woven protective net 1-2 to achieve the optimal tension, prevent sagging, and ensure uniform tension of the entire net.

[0041] Step 4: Final Inspection and Testing. Perform a thorough visual inspection of the entire assembly. Check for loose connections, sagging of the protective carbon fiber woven protection net 1-2, or potential hazards. Verify the function of the adjustment lock 5 and ensure smooth and reliable adjustment of the net tension. Consider performing a simulated load test (e.g., applying a controlled weight) before final deployment to verify the structural integrity and load-bearing capacity of the system.

[0042] This detailed implementation process relates each step to a specific component and its function. The specific installation procedures may vary depending on the exact design of the components selected and the characteristics of the transmission tower. Safety measures are essential throughout the installation process.

[0043] The following points should be noted in this installation example:

[0044] 1. Safety measures: When installing this device in an aerial work environment, safety is of paramount importance. Construction workers must wear personal protective equipment such as safety belts and take necessary safety precautions, such as setting up safety nets and warning areas. When working near high-voltage transmission lines, safety operating procedures must be strictly followed to prevent electric shock accidents. All installation steps should be carried out under the guidance of professionals;

[0045] 2. Environmental factors: The installation process needs to consider the impact of environmental factors, such as weather conditions (wind, rain, snow, etc.). Installation work should be suspended under severe weather conditions to ensure the safety of construction workers and the installation quality of the device. The topography around the transmission tower should also be considered to select a suitable installation location and method to ensure the stability and reliability of the device;

[0046] 3. Material selection and quality control: It is very important to select high-quality carbon fiber materials 7 and super-hydrophobic anti-ice and snow coatings 8, which are directly related to the strength, durability and anti-ice and snow performance of the protective net. Strict quality inspection should be carried out before use to ensure that the materials meet the requirements of the specifications. In addition, the quality of the cable connection structure 4 and the insulating support structure 1-1 also needs to be strictly controlled to ensure that they can withstand the expected load and provide sufficient electrical insulation performance. The installation of all components must comply with the specifications and be tested accordingly to ensure their stability and reliability.

[0047] It should be noted that the above content only illustrates the technical idea of ​​the present invention and cannot be used to limit the protection scope of the present invention. For ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications all fall within the protection scope of the claims of the present invention.

Claims

1. A carbon fiber protective net device for preventing ice falling on a large-span transmission tower, characterized in that: The invention comprises a carbon fiber woven protective net (1-2), an insulating support structure (1-1) and a suspension cable connection structure (4); the insulating support structure (1-1) is located around the carbon fiber woven protective net (1-2) and is movably connected to the carbon fiber woven protective net (1-2); a stabilizing cable is provided on the outside of the insulating support structure (1-1) and is connected to the tower body, thereby improving the wind resistance stability of the protective net; the suspension cable connection structure (4) suspends the protective net below the cross arm of the transmission tower and is parallel to the wires of the transmission tower.

2. The carbon fiber protective net device for preventing ice falling from a large-span transmission tower according to claim 1 is characterized in that: The main body of the carbon fiber woven protective net (1-2) is woven from carbon fiber material (7).

3. The carbon fiber protective net device for preventing ice falling from a large-span transmission tower according to claim 2 is characterized in that: The surface of the carbon fiber woven protective net is sprayed with a super hydrophobic anti-ice and snow coating (8).

4. The carbon fiber protective net device for preventing ice falling from a large-span transmission tower according to claim 1 is characterized in that: The insulating support structure (1) is made of a multi-layer composite insulating material, and windproof grooves are provided around the insulating support structure (1).

5. The carbon fiber protective net device for preventing ice falling from a large-span transmission tower according to claim 1 is characterized in that: The cable connection structure (4) comprises a high-voltage resistant cable and an adjustment buckle (5) at the end. The high-voltage resistant cable fixes the protective net on the transmission tower in a multi-point fixing manner. The high-voltage resistant cable is provided with a tensioning device. The adjustment buckle is used to flexibly adjust the height and tension of the protective net, so that the device can adapt to different transmission tower heights and different terrain conditions.

6. The carbon fiber protective net device for preventing ice falling from a large-span transmission tower according to claim 1 is characterized in that: The carbon fiber woven protective net (1-2) is embedded with embedded nuts (6), and the suspension cable connection structure (4) and the carbon fiber woven protective net (1-2) are fastened and connected via high-strength bolts and the embedded embedded nuts (6).

7. The carbon fiber protective net device for preventing ice falling from a large-span transmission tower according to claim 1 is characterized in that: By constructing the function of the manufacturing cost F of the carbon fiber woven protective net with respect to the volume V of the protective net, the optimal design parameters of the protective net are obtained to ensure the optimal combination of material utilization efficiency and structural strength while meeting the requirements of the carrying capacity and impact resistance of the protective net; where t and d are the unit thickness and unit mesh size respectively; w t With w d are the cost coefficients per unit thickness and per unit mesh size respectively; then the manufacturing cost F of the carbon fiber protective net as a function of the volume V of the protective net is: min F={w t t,w d d} In order to ensure the performance of the carbon fiber protective net in terms of wind resistance, load bearing and elasticity, the thickness t and mesh size d meet the following constraints: Where, σ, ε and disp are the maximum stress, maximum strain and total deformation of the carbon fiber protective net respectively; σ max ,∈ max and lim are the maximum allowable stress, maximum allowable strain and total allowable deformation, respectively.

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