Wear-resistant windproof arresting cable and mounting method thereof

Abstract

The invention provides a wear-resistant windproof arresting cable and a mounting mode thereof. The wear-resistant windproof arresting cable comprises two windage yaw preventing insulators, a collision-resistant area, a wear-resistant fitting and a damping device. Umbrella skirts are arranged outside the windage yaw insulators, the two windage yaw insulators are rigidly connected through a collision-resistant area, and a damping device is further arranged between the windage yaw insulator at one end and the wear-resistant fitting; the damping device comprises a spring and two opposite V-shaped hooks penetrating through the spring, the opening of each V-shaped hook is hung on one side of the spring, the top of each V-shaped hook is located on the other side of the spring, and the tops of the two V-shaped hooks are connected with the wear-resistant fitting and the windage yaw prevention insulator respectively. By means of the technical scheme, the whole windproof arresting cable is a whole, movable connection can be achieved only at the position of the damping device, movable parts of the windproof arresting cable are reduced, abrasion portions of the windproof arresting cable are reduced, and the damping device is further adopted to achieve the buffering effect after the windproof arresting cable is impacted.

Description

Technical Field

[0001] This invention relates to the field of wind deflection prevention technology for power transmission lines, and in particular to a wear-resistant wind-resistant barrier cable and its installation method on power transmission towers. Background Technology

[0002] Wind-induced deflection of transmission lines refers to the phenomenon where conductors deviate from their proper position under wind force, resulting in insufficient insulation distance to the towers and causing flashover discharge. Wind-induced deflection leads to a low reclosing success rate and often causes serious consequences such as conductor arc burns, strand breakage, and wire breakage. Wind-induced deflection is one of the main factors affecting the safe operation of transmission lines, posing a significant threat to their safety.

[0003] Overhead transmission lines operate outdoors for extended periods, making them highly susceptible to natural conditions and climate changes. Wind deflection typically occurs alongside severe weather events such as strong winds and thunderstorms, complicating fault diagnosis and location. Common preventative measures include installing jumper strings or counterweights on conductors experiencing wind deflection faults. However, these modifications often prove ineffective in preventing wind deflection. First, conductors with added jumper strings remain prone to wind-induced tripping; second, the large surface area of ​​the counterweights makes them susceptible to wind catching, potentially causing flashover when strong winds blow against them. Third, after adding counterweight plates to the conductors, each counterweight plate weighs several hundred kilograms, while the conductor's stress is limited by design requirements. This adds extra load to the towers, requiring a re-verification of the tower load. It also sacrifices the tower's design margin, making the towers more susceptible to damage in strong winds, and in severe cases, tower collapse and line breakage, resulting in more serious consequences than line wind-induced tripping, making it a losing proposition. Finally, the counterweight plates are expensive, inconvenient to transport, and have high modification and installation costs.

[0004] Patent application publication (CN106711905A) discloses a structure for a transmission line tower designed to prevent wind deflection. This structure employs a flexible blocking cable for wind protection. The flexible blocking cable consists of, from top to bottom, a tower extension fitting, a first flexible composite insulator with sheds, a flexible composite insulator without sheds, a second flexible composite insulator with sheds, a first connecting fitting, a cable, a second connecting fitting, a spring, and a third connecting fitting. The flexible blocking cable connects the unused end of each conductor crossarm to the middle of the tower. The tower extension fitting connects to the unused end of the conductor crossarm, and the third connecting fitting connects to the middle of the tower. The problems with this patent are: too many connection points for each component, and the use of only ordinary springs. Over time, this causes the cable to stretch and lengthen, increasing the wind-resistant spacing and affecting the wind protection effect. Furthermore, because the flexible blocking cable uses a rope, its position changes significantly under long-term wind force, resulting in poor reliability. Summary of the Invention

[0005] The technical problem to be solved by the present invention is that the existing windproof barrier device has too many connection points for each component and uses pull ropes, which leads to a larger windproof spacing, affecting the windproof effect and resulting in poor reliability.

[0006] To solve the above-mentioned technical problems, the present invention first provides a wear-resistant and windproof barrier cable, comprising: two windproof deflection insulators rigidly connected by a collision-resistant zone, wherein the windproof deflection insulators are provided with umbrella skirts; Wear-resistant fittings for installing wind-resistant deflection insulators on transmission towers, wherein a damping device is also provided between the wind-resistant deflection insulator and the wear-resistant fitting at one end; The damping device includes: a spring, two V-shaped hooks passing through the spring and facing each other, the opening of the V-shaped hooks being attached to one side of the spring, the top of the V-shaped hooks being located on the other side of the spring, and the tops of the two V-shaped hooks being respectively connected to wear-resistant hardware and windproof deflection insulators.

[0007] Through the above technical solution, the upper end of the wind-resistant barrier cable is fixedly installed on the power transmission tower, and the other end is installed on the tower via damping. The entire wind-resistant barrier cable is a single unit, with flexible connection only at the damping device. This solution reduces the number of moving parts in the wind-resistant barrier cable, lowers the wear-prone areas, and further utilizes the damping device to achieve a buffering effect after impact. On the other hand, because the wind-resistant deflector insulator and the wear-resistant hardware are indirectly locked to the spring via two V-shaped hooks, the increased tension compresses the spring, preventing it from stretching under any conditions. This ensures that the total length of the wind-resistant barrier cable remains constant, further increasing its reliability.

[0008] Preferably, the wear-resistant fittings and the windproof deflector insulator are connected by a plurality of PT adjustment plates, and / or the wear-resistant fittings and the damping device are connected by a plurality of PT adjustment plates.

[0009] By introducing a PT adjustment plate as a connector between the wear-resistant fittings and the windproof deflector insulator and / or damping device, the flexibility of the windproof barrier cable can be further enhanced to adapt to different usage scenarios.

[0010] To improve the wear resistance of the impact-resistant zone, preferably, the impact-resistant zone is made of silicone rubber, and the silicone rubber is provided with a wear-resistant layer, which is a polyurethane wear-resistant coating doped with ceramic particles.

[0011] To ensure a firm and reliable application of the polyurethane wear-resistant coating to the impact-resistant area, the method for applying the polyurethane wear-resistant coating to the impact-resistant area is further as follows: After cleaning the surface of the silicone rubber substrate in the impact-resistant zone, the surface roughness of the silicone rubber substrate is treated to be no less than Ra 6.3μm; The rough surface of the silicone rubber substrate is cleaned again; A silicone rubber-polyurethane adhesive is coated onto a rough silicone rubber substrate surface; A polyurethane wear-resistant coating is applied to the outer layer of the silicone rubber-polyurethane adhesive; After the polyurethane coating liquid dries, an impact-resistant zone is obtained by coating a polyurethane wear-resistant coating.

[0012] Optionally, the method for preparing the polyurethane wear-resistant coating liquid is as follows: nitride ceramic powder with a particle size of less than 100 nm and amino polyethylene glycol azide are uniformly dispersed in polyurethane stock solution and thoroughly mixed, and the solid content is controlled to be 65%~72% to obtain polyurethane wear-resistant coating liquid, wherein the mass ratio of polyurethane:nitride ceramic powder:amino polyethylene glycol azide is 24~34:9.6~10.6:2.

[0013] The compatibility between nitride ceramic powder and polyurethane raw material is improved by using amino-polyethylene glycol azide, so that the nitride ceramic powder can be uniformly mixed in polyurethane raw material.

[0014] Optionally, the method for preparing the silicone rubber-polyurethane adhesive liquid is as follows: γ-propyltriethoxysilane, polyurethane powder, silicone rubber powder, and DMAC are thoroughly mixed to obtain the silicone rubber-polyurethane adhesive liquid, wherein the proportion of γ-propyltriethoxysilane is not less than 0.5%.

[0015] The bonding ability between silicone rubber and polyurethane is improved by using γ-isocyanate propyltriethoxysilane.

[0016] Based on the above-mentioned windproof barrier cable, the present invention also provides a method for installing the wear-resistant windproof barrier cable on a power transmission tower.

[0017] The transmission towers include any one of the following: goblet towers, cat-head towers, and portal towers.

[0018] The wind-resistant barrier cable is installed on the power transmission tower, and the installation method is as follows: The upper end of the windproof barrier cable is installed at the first hanging point at a first distance from the suspension insulator using the wear-resistant fittings at the upper end of the windproof barrier cable. The first hanging point is located at the crossarm of the transmission tower. The lower end of the windproof barrier cable is installed at the glass body of the wine glass tower using wear-resistant hardware at the lower end of the windproof barrier cable. The damping device is located at the lower end of the windproof barrier cable.

[0019] The technical advantages of this application are as follows: 1. In this invention, the upper end of the wind-resistant barrier cable is fixedly installed on the power transmission tower, and the other end is installed on the tower via a damping mechanism. The entire wind-resistant barrier cable is a single unit, with flexible connection only at the damping device. This design reduces the number of moving parts in the wind-resistant barrier cable, lowers the wear-prone areas, and further utilizes a damping device to achieve a buffering effect after impact. On the other hand, because the wind-resistant deflector insulator and the wear-resistant hardware are indirectly linked by two V-shaped hooks with a spring, the tension increases, the spring compresses, and the spring will not stretch under any conditions, thus ensuring that the total length of the wind-resistant barrier cable does not increase, further enhancing its reliability.

[0020] 2. This invention coats the impact-resistant zone of silicone rubber with a polyurethane wear-resistant coating, thereby improving the wear resistance of the impact-resistant zone. To fuse the low-polarity silicone rubber and the high-polarity polyurethane elastomer together, this invention uses γ-propyltriethoxysilane isocyanate as a connecting bridge between the silicone rubber and the polyurethane elastomer. By mixing the silicone rubber and polyurethane elastomer together to form a high-strength silicone rubber-polyurethane adhesive, and utilizing the good compatibility of the silicone rubber-polyurethane adhesive with both silicone rubber and polyurethane, an effective bond is achieved between the impact-resistant zone of the silicone rubber and the polyurethane wear-resistant coating.

[0021] 3. To address the issue of poor compatibility between nitride ceramic powder and polyurethane raw material, nano-nitride ceramic powder is used in the polyurethane wear-resistant coating of this invention. To achieve thorough mixing of the nano-nitride ceramic powder in the polyurethane raw material, amino polyethylene glycol azide is mixed into the polyurethane raw material. Amino polyethylene glycol azide has high compatibility with both polyurethane and nitride ceramic powder, thereby achieving the effect of uniformly dispersing the nano-nitride ceramic powder in the polyurethane raw material. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of a wear-resistant and windproof barrier cable in an embodiment of the present invention.

[0023] Figure 2 This is a schematic diagram of a damping device in a wear-resistant and windproof barrier cable according to an embodiment of the present invention.

[0024] Figure 3 This is a schematic diagram of a structure in which a polyurethane wear-resistant coating is applied to the impact-resistant area of ​​a silicone rubber in an embodiment of the present invention.

[0025] Figure 4 This is a schematic diagram of the windbreak cable installed on the wine glass tower in an embodiment of the present invention.

[0026] Figure 5 This is a schematic diagram of the windproof barrier cable being installed on the cat-head tower in an embodiment of the present invention.

[0027] Figure 6 This is a schematic diagram of the wind-resistant barrier cable installed on the portal tower in an embodiment of the present invention.

[0028] Explanation of reference numerals in the attached figures: 1. Windproof insulator; 2. Impact-resistant zone; 3. Wear-resistant fittings; 4. Damping device; 41. Spring; 42. V-shaped hook; 5. PT adjustment plate; 1000. Transmission tower; 1001. First hanging point; 1002. Second hanging point; 1100. Suspension insulator. Detailed Implementation

[0029] The following will be combined with the appendix Figures 1-6 The embodiments of the technical solution of this application are described in detail below. The following embodiments are only used to illustrate the technical solution of this application more clearly, and are therefore only examples and should not be used to limit the scope of protection of this application.

[0030] like Figure 1 This illustration shows one embodiment of the windproof barrier cable provided by the present invention. The device includes: two windproof deflector insulators 1, an impact-resistant zone 2, wear-resistant fittings 3, and a damping device 4. The windproof deflector insulators 1 are fitted with skirts. The two windproof deflector insulators 1 are rigidly connected by the impact-resistant zone 2. The windproof deflector insulators 1 and the impact-resistant zone 2 are integrally formed from rods. The windproof deflector insulators 1 are installed on the transmission tower via the wear-resistant fittings 3. A damping device 4 is also provided between one end of the windproof deflector insulator 1 and the wear-resistant fitting. The damping device 4 includes: a spring 41, two V-shaped hooks 42 passing through the spring 41 and facing each other. The opening of the V-shaped hook 42 is attached to one side of the spring 41, and the top of the V-shaped hook is located on the other side of the spring. The tops of the two V-shaped hooks are respectively connected to the wear-resistant fittings 3 and the windproof deflector insulators 1.

[0031] In some embodiments, the windproof deflector insulator 1 is provided with an outer skirt to increase insulation performance and creepage distance. Compared with the prior art that connects two windproof deflector insulators 1 and the impact-resistant zone 2 through a movable connector, the present invention rigidly connects two windproof deflector insulators 1 through the impact-resistant zone 2 to form an integral structure, eliminating mutual friction between the connectors and enhancing the stability of the windproof barrier cable structure through the integrally formed structure. Generally, the skirt of the windproof deflector insulator 1 and the impact-resistant zone 2 are made of silicone rubber.

[0032] The impact-resistant zone 2 is located between the two wind-resistant insulators 1, and serves to connect the wind-resistant insulators 1 and block the wind deflection of the transmission line. The impact-resistant zone 2 blocks the transmission line installed at the lower end of the suspension insulator 1100 from deflecting due to wind.

[0033] Considering the wear problem of wear-resistant fittings 3 during long-term operation and to ensure that they have good wear resistance, wear-resistant fittings 3 can generally be made of high-strength alloy steel, high-strength alloy aluminum, or other materials.

[0034] like Figure 2 The schematic damping device 4 includes a spring 41 and two opposing V-shaped hooks 42. The spring 41 passes through the two V-shaped hooks 42, with the opening of the hooks hooked to one side of the spring and the top of the hooks located on the other side. The tops of the two V-shaped hooks are respectively connected to the wear-resistant fitting 3 and the windproof insulator 1, forming a damping connection. Figure 2 The solid arrow indicates the stretching direction of the V-shaped hook 42, and the dashed arrow indicates the deformation direction of the spring 41. The spring 41 is compressed under the action of the V-shaped hook 42, absorbing the impact force generated by the wind deflection of the transmission line against the windproof barrier cable. Through this damping connection, the windproof barrier cable can achieve a buffering effect when it is impacted, reducing wear and impact.

[0035] like Figures 4-6 This illustration shows an embodiment of installing the wind-resistant barrier cable provided by the present invention on a power transmission tower, such as... Figures 4-6 These are schematic diagrams showing the installation of windbreak cables on the goblet tower, cat head tower, and portal tower, respectively.

[0036] The wind-resistant barrier cable is installed on the power transmission tower, and the installation method is as follows: Using the wear-resistant fittings 3 at the upper end of the windproof barrier cable, the upper end of the windproof barrier cable is installed at the first hanging point 1001 at a first distance from the suspension insulator 1100. The first hanging point is located at the crossarm of the transmission tower 1000. The lower end of the windproof barrier cable is installed at the second hanging point 1002 on the tower body of the transmission line tower using the wear-resistant hardware 3 at the lower end of the windproof barrier cable. The damping device 4 is located at the lower end of the windproof barrier cable.

[0037] It should be noted that the attached diagrams are only for illustrating the technical solution itself and do not limit specific specifications and parameters. For example, the voltage level of the applied transmission tower 1000 can be used for various voltage level tower types, such as 110kV, 220kV, 330kV, 500kV, etc. For example, applicable voltage levels and tower types include: 35kV wine glass tower, cat head tower, portal tower; 110kV Goblet Tower, Cat Head Tower, Portal Tower; 220kV wine glass tower, cat head tower, portal tower; 330kV Goblet Tower, Cat Head Tower, Portal Tower; 500kV Goblet Tower, Cat Head Tower, Portal Tower; It can also be used for tower types with higher or lower voltage levels. The specific parameters for different voltage level transmission line towers can be designed according to the relevant specifications in this field, and will not be repeated here.

[0038] like Figure 4 The diagram illustrates the installation of windbreak cables on a wine glass tower.

[0039] like Figure 5 The diagram illustrates the installation of windbreak cables on the cat-head tower.

[0040] like Figure 6 The diagram illustrates the installation of wind-resistant cables on a portal tower.

[0041] In the above embodiments, when wind force acts on the conductor, causing the conductor installed at the lower end of the suspension insulator 1100 to deflect and impact the impact zone 2 on the windbreak cable, the windbreak cable will be subjected to a certain impact force. The impact zone 2 first acts as a buffer, absorbing part of the impact force. If the impact force is too large, the damping device 4 begins to function. The spring 41 in the damping device 4 is compressed under the action of the V-shaped hook 42, absorbing part of the impact force and slowing down the swaying of the windbreak cable. Through this damping connection, the windbreak cable can achieve a buffering effect when subjected to impact, reducing wear and damage.

[0042] like Figures 4-6 The upper end of the wind-resistant barrier cable is fixedly installed on the transmission tower 1000, and the other end is installed on the transmission tower via a damping mechanism. The entire wind-resistant barrier cable is a single unit, flexibly connected only at the damping device. This design reduces the number of moving parts in the wind-resistant barrier cable, lowers the wear-prone areas, and further utilizes a damping device to achieve a buffering effect after impact. On the other hand, because the wind-resistant deflector insulator and the wear-resistant hardware are indirectly locked to the spring via two V-shaped hooks, the increased tension compresses the spring, preventing it from stretching under any conditions. This ensures that the total length of the wind-resistant barrier cable remains constant, further increasing its reliability.

[0043] like Figure 1 , Figures 4-6 In some embodiments, the wear-resistant fitting 3 and the windproof deflector insulator 1 are connected by a plurality of PT adjustment plates, and / or the wear-resistant fitting 3 and the damping device 4 are connected by a plurality of PT adjustment plates.

[0044] By introducing a PT adjustment plate 5 as a connector into the windbreak cable, the flexibility of the windbreak cable can be enhanced to adapt to different installation requirements and space constraints. The PT adjustment plate 5 is a plate-shaped connecting hardware with adjustable connection length. Specifically, by adjusting the position of the bolt holes on the PT adjustment plate 5, the connection length between the wear-resistant hardware and the windbreak insulator or damping device can be easily adjusted to adapt to different installation requirements and space constraints. In application scenarios, the PT adjustment plate 5 is made of high-strength material, possessing good load-bearing capacity and deformation resistance. The connection via the PT adjustment plate ensures the stability of the device under the influence of external forces such as wind. In optional embodiments, a PT adjustment plate is used to connect the wear-resistant hardware 3 to the windbreak insulator 1, and also to connect the wear-resistant hardware 3 to the damping device 4.

[0045] like Figure 3 To improve the wear resistance of the silicone rubber impact-resistant zone, in some embodiments, the impact-resistant zone 2 is made of silicone rubber, with an outer wear-resistant layer. This wear-resistant layer is a polyurethane wear-resistant coating doped with ceramic particles. The wear-resistant layer, using a polyurethane wear-resistant coating doped with ceramic particles, possesses extremely high hardness and wear resistance, effectively resisting impacts and friction after wind deflection of the transmission line. Ceramic particles have excellent hardness and wear resistance; incorporating them into the polyurethane coating significantly improves the coating's hardness and wear resistance. Simultaneously, the ceramic particles also increase the coating's tear resistance and impact resistance, making the wear-resistant layer more robust and durable.

[0046] Specifically, the method for applying the above-mentioned polyurethane wear-resistant coating to the impact-resistant area is as follows: Step 1: Clean the surface of the silicone rubber substrate in the impact-resistant zone. Thoroughly clean the surface of the silicone rubber substrate in the impact-resistant zone to remove oil, dust and other impurities, ensuring good adhesion between the subsequent coating and the substrate. Generally, alcohol, acetone and other cleaning agents can be used to thoroughly clean the surface of the silicone rubber substrate in the impact-resistant zone. After cleaning, dry the surface with a clean cloth or air to ensure that there is no residual moisture or cleaning agent.

[0047] Step 2: Roughen the surface of the silicone rubber substrate to a minimum of Ra 6.3 μm. Increasing the roughness increases the contact area between the coating and the substrate, thereby improving adhesion. Sandpaper, grinding wheels, or similar methods can generally be used to roughen the silicone rubber substrate surface to a minimum of Ra 6.3 μm or higher.

[0048] Step 3: Clean the rough silicone rubber substrate surface again to ensure that no residual impurities affect the adhesion of the coating.

[0049] Step 4: Coat the rough silicone rubber substrate surface with a silicone rubber-polyurethane adhesive. The silicone rubber-polyurethane adhesive is prepared by thoroughly mixing γ-propyltriethoxysilane, polyurethane powder, silicone rubber powder, and DMAC, with the γ-propyltriethoxysilane comprising at least 0.5%. Coating the rough silicone rubber substrate surface with this silicone rubber-polyurethane adhesive allows the adhesive to act as a bridge, enhancing the adhesion between the polyurethane wear-resistant coating and the silicone rubber substrate.

[0050] Step 5: Coat the outer layer of the silicone rubber-polyurethane adhesive with a polyurethane wear-resistant coating liquid. The method for preparing the polyurethane wear-resistant coating liquid is as follows: Nitride ceramic powder with a particle size of less than 100 nm and amino polyethylene glycol azide are uniformly dispersed in the polyurethane stock solution and thoroughly mixed, with the solid content controlled at 65%~72%, to obtain the polyurethane wear-resistant coating liquid. The mass ratio of polyurethane:nitride ceramic powder:amino polyethylene glycol azide is 24~34:9.6~10.6:2. The amino polyethylene glycol azide can be selected as amino trimethylene glycol azide or amino polyethylene glycol azide.

[0051] After the polyurethane coating liquid dries, an impact-resistant zone is obtained by coating a polyurethane wear-resistant coating.

[0052] The following specific embodiments and comparative examples illustrate the effect of applying a polyurethane wear-resistant coating to the impact-resistant area provided by the present invention.

[0053] Example 1: Preparation of polyurethane wear-resistant coating liquid Example 1-1 Preparation of polyurethane stock solution: 45 parts by weight of polyurethane elastomer powder were added to 30 parts by weight of DMAC solvent and mixed thoroughly to obtain 75 parts by weight of polyurethane stock solution.

[0054] Preparation of polyurethane wear-resistant coating liquid: 10 parts by weight of silicon nitride ceramic powder with a particle size less than 100 nm, 10 parts by weight of aluminum nitride ceramic powder with a particle size less than 100 nm, and 5 parts by weight of aminopolyethylene glycol azide are uniformly dispersed in 75 parts of polyurethane stock solution and thoroughly mixed to obtain a polyurethane wear-resistant coating liquid with a solid content of 71.4%. It should be noted that the solid content in this application refers to the ratio of the amount of solute to the amount of (solute + solvent), where the solute can be: polyurethane powder, nitride ceramic powder, coupling agent, aminopolyethylene glycol azide, or silicone rubber powder.

[0055] Examples 1-2 to 1-5 The difference between Examples 1-2 to 1-5 and Example 1-1 lies in the different control conditions for each step. For details of the control conditions, please refer to Table 1.

[0056] Comparative Example 1 The difference between Comparative Example 1-1 and Examples 1-3 is that Comparative Example 1-1 does not contain amino polyethylene glycol azide, while the rest is the same as Example 1. For specific control conditions, please refer to Table 1.

[0057] The difference between Comparative Examples 1-2 and Examples 1-3 is that Comparative Example 1-1 does not add amino polyethylene glycol azide, but adds KH-540 coupling agent. Otherwise, it is the same as Example 1. For specific control conditions, please refer to Table 1. Example polyurethane powder / part DMAC / copy Silicon nitride ceramic powder / part Aluminum nitride ceramic powder / part KH-540 coupling agent / part Amino-polyethylene glycol azide / part Total / portions Solid content / % Example 1-1 50 30 10 10 0 4 104 71.15 Examples 1-2 50 40 10 10 0 4 114 64.91 Examples 1-3 61 40 10 10 0 4 125 68.00 Examples 1-4 66 40 8 8 0 3 125 68.00 Examples 1-5 56 40 12 12 0 5 125 68.00 Comparative Example 1-1 61 40 10 10 0 0 121 66.94 Comparative Examples 1-2 61 40 10 10 4 0 125 68.00

[0058] Example of preparing silicone rubber-polyurethane adhesive: Example 2-1 A silicone rubber-polyurethane adhesive with a solid content of 69% was obtained by thoroughly mixing 0.8 parts of γ-isocyanate propyltriethoxysilane, 50 parts of polyurethane powder, 50 parts of silicone rubber powder, and 45 parts of DMAC. Examples 2-2 to 2-3 The difference between Examples 2-2 and 2-3 and Example 2-1 lies in the different control conditions for each step. For details of the control conditions, please refer to Table 2.

[0059] Comparative Example 2-1 The only difference between Comparative Example 2-1 and Example 2-1 is that Comparative Example 2-1 does not contain γ-isocyanate propyltriethoxysilane. Otherwise, it is the same as Example 2-1. For specific control conditions, please refer to Table 2. Example 2-1 Example 2-2 Example 2-3 Comparative Example 2-1 γ-Propyltriethoxysilane 0.8 0.8 0.8 0 silicone rubber powder 50 60 40 50 polyurethane powder 50 40 60 50 DMAC 45 45 45 45 total 145.8 145.8 145.8 145 Solid content 69.14% 69.14% 69.14% 68.97%

[0060] Example 3: Example 3-1: Step 1: Clean the surface of the silicone rubber substrate in the impact-resistant zone; Step 2: Roughen the surface of the silicone rubber substrate to a minimum of Ra 6.3 μm; Step 3: Clean the rough silicone rubber substrate surface again; Step 4: Coat the rough silicone rubber substrate surface with the silicone rubber-polyurethane adhesive obtained in Example 2-1, with a coating amount of 0.25 g / cm². 2 ; Step 5: Coat the outer layer of the silicone rubber-polyurethane adhesive with the polyurethane wear-resistant coating liquid obtained in Example 1-1, with a coating amount of 1.8 g / cm² per unit area. 2 After the polyurethane coating liquid dries, an impact-resistant zone coated with a polyurethane wear-resistant coating is obtained.

[0061] Examples 3-2 to Comparative Examples 3-6: Examples 3-2 to Comparative Examples 3-6 differ from Example 3-1 in that the control conditions for each step are different. For details of the control conditions, please refer to Table 3.

[0062] Table 3 Control conditions for each step of Examples 3-1 to Comparative Examples 3-6 Mechanical performance tests were conducted on the windproof barrier cables obtained in Examples 3-1 to 3-5.

[0063] Abrasion resistance test: Abrasion resistance was tested according to the national standard GB / T 1768-2006. The abrasion performance was tested using the rotating rubber grinding wheel method, and the abrasion loss was calculated. The abrasion loss test results are shown in Table 4.

[0064] Adhesion strength test: A 5cm × 5cm section of the impact-resistant silicone rubber substrate-polyurethane abrasion-resistant coating was cut with a blade. On the peel test platform, one end of the silicone rubber substrate was fixed, and the other end of the polyurethane abrasion-resistant coating was fixed. The substrate was slowly tightened and continuously stretched to perform a tensile peel test. The adhesion cracking was observed and recorded to evaluate the adhesion strength value. The adhesion strength test results are shown in Table 4.

[0065] Table 4. Test results of polyurethane wear-resistant coating performance obtained from the comparative examples of each embodiment. Test metrics Bond strength / MPa Wear resistance loss / mg Example 3-1 41.8 5.2 Example 3-2 42.3 5.2 Example 3-3 41.9 5.3 Examples 3-4 42.2 5.2 Examples 3-5 42.0 5.2 Examples 3-6 38.8 5.3 Examples 3-7 37.9 5.4 Comparative Example 3-1 38.4 6.7 Comparative Example 3-2 42.5 28.2 Comparative Example 3-3 43.0 17.6 Comparative Examples 3-4 24.7 5.8 Comparative Examples 3-5 11.2 5.7 As can be seen from Examples 3-1 to 3-7 above, the polyurethane wear-resistant coatings applied to the impact-resistant area all exhibit good wear resistance, with wear loss not exceeding 5.5 mg. As can be seen from Examples 3-1 to 3-5 above, the adhesion strength between the polyurethane wear-resistant coating applied to the impact-resistant area and the silicone rubber substrate all exceed 41 MPa.

[0066] In Examples 3-6 to 3-7, the measured bonding strength was worse than that in Examples 3-1 to 3-5. This is because the silicone rubber-polyurethane adhesive used in Examples 3-6 to 3-7 was derived from Examples 2-2 and 2-3. This indicates that the silicone rubber-polyurethane adhesive contained a small amount of either silicone rubber or polyurethane, which is not conducive to the bonding of the silicone rubber-polyurethane adhesive to the silicone rubber substrate or polyurethane coating.

[0067] The bonding strength of Comparative Example 3-1 is worse than that of Example 3-3 because surface roughening treatment was not performed in step two of Comparative Example 3-1.

[0068] The poor wear resistance of the polyurethane wear-resistant coatings applied to the impact-resistant areas in Comparative Examples 3-2 and 3-3 is due to the absence of amino-polyethylene glycol azide in Comparative Example 3-2, resulting in poor dispersion of the nitride ceramic powder in the polyurethane and uneven dispersion, thus leading to poor wear resistance. Comparative Example 3-3, without amino-polyethylene glycol azide but with the addition of KH-540 coupling agent, showed better wear resistance than Comparative Example 3-2, but worse than Examples 3-1 to 3-7. This indicates that KH-540 coupling agent can improve the dispersion of nitride ceramic powder in polyurethane, but its dispersion effect is worse than that of amino-polyethylene glycol azide.

[0069] The polyurethane wear-resistant coatings obtained in Comparative Examples 3-4 and 3-5 showed poor adhesive strength. The presumed reason is that Comparative Example 3-4 used the silicone rubber-polyurethane adhesive obtained in Comparative Example 2-1. The silicone rubber-polyurethane adhesive in Comparative Example 2-1 did not contain γ-propyltriethoxysilane, resulting in poor compatibility between silicone rubber and polyurethane, thus causing poor adhesion. Comparative Example 3-5 did not use a silicone rubber-polyurethane adhesive, and due to the poor compatibility between silicone rubber and polyurethane, the polyurethane wear-resistant coating obtained in Comparative Example 3-5 also showed poor adhesive strength.

[0070] Finally, it should be noted that the reference to "embodiment" herein means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0071] In the description of the embodiments of this application, the technical terms "upper" and "lower" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0072] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the technical terms such as "set," "equipped with," "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, an integral part, or a mechanical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0073] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A wear-resistant and windproof barrier cable, characterized in that, include: Two windproof deflection insulators (1) are rigidly connected by a collision-resistant zone (2), and the windproof deflection insulators (1) are provided with umbrella skirts. Wear-resistant fittings (3) are used to install wind-resistant deflection insulators (1) on transmission towers, wherein a damping device (4) is also provided between the wind-resistant deflection insulators (1) and the wear-resistant fittings at one end. The damping device (4) includes: a spring (41), two V-shaped hooks (42) passing through the spring (41) and facing each other, the opening of the V-shaped hook (42) is hung on one side of the spring (41), the top of the V-shaped hook is located on the other side of the spring, and the top of the two V-shaped hooks are respectively connected to a wear-resistant fitting (3) and a windproof deflector insulator (1).

2. The wear-resistant and windproof barrier cable according to claim 1, characterized in that, The wear-resistant fittings (3) and the windproof deflector insulator (1) are connected by a number of PT adjustment plates (5), and / or the wear-resistant fittings (3) and the damping device (4) are connected by a number of PT adjustment plates (5).

3. The wear-resistant and windproof barrier cable according to claim 1, characterized in that, The impact-resistant zone is made of silicone rubber, and the silicone rubber is covered with a wear-resistant layer, which is a polyurethane wear-resistant coating doped with ceramic particles.

4. The wear-resistant and windproof barrier cable according to claim 3, characterized in that, The method for applying the polyurethane wear-resistant coating to the impact-resistant area is as follows: After cleaning the surface of the silicone rubber substrate in the impact-resistant zone, the surface roughness of the silicone rubber substrate is treated to be no less than Ra6.3μm; The rough surface of the silicone rubber substrate is cleaned again; A silicone rubber-polyurethane adhesive is coated onto a rough silicone rubber substrate surface; A polyurethane wear-resistant coating is applied to the outer layer of the silicone rubber-polyurethane adhesive; After the polyurethane coating liquid dries, an impact-resistant zone coated with a polyurethane wear-resistant coating is obtained; The above-mentioned wear-resistant coating is applied to the clean, impact-resistant area, and after drying, a wear-resistant layer is formed.

5. The wear-resistant and windproof barrier cable according to claim 4, characterized in that, Nitride ceramic powder with a particle size of less than 100 nm and amino polyethylene glycol azide are uniformly dispersed in polyurethane stock solution and thoroughly mixed, and the solid content is controlled at 65%~72% to obtain polyurethane wear-resistant coating liquid, wherein the mass ratio of polyurethane:nitride ceramic powder:amino polyethylene glycol azide is 24~34:9.6~10.6:

2.

6. The wear-resistant and windproof barrier cable according to claim 5, characterized in that, The nitride ceramic powder is at least one of aluminum nitride and silicon nitride.

7. The wear-resistant windproof barrier cable according to claim 4, characterized in that, The method for preparing the silicone rubber-polyurethane adhesive is as follows: γ-propyltriethoxysilane, polyurethane powder, silicone rubber powder, and DMAC are thoroughly mixed to obtain the silicone rubber-polyurethane adhesive, wherein the proportion of γ-propyltriethoxysilane is not less than 0.5%.

8. A method for installing wear-resistant and windproof barrier cables, characterized in that, Used for installing the wear-resistant and windproof barrier cable according to any one of claims 1 to 7 on power transmission towers.

9. The installation method according to claim 8, characterized in that, The transmission towers include any one of the following: goblet towers, cat-head towers, and portal towers.

10. The installation method according to claim 8 or 9, characterized in that, The wind-resistant barrier cable is installed on the power transmission tower, and the installation method is as follows: Using the wear-resistant fittings (3) at the upper end of the windproof barrier cable, the upper end of the windproof barrier cable is installed at the first hanging point (1001) at a first distance from the suspension insulator. The first hanging point (1001) is located at the crossarm of the transmission tower. Using the wear-resistant fittings (3) at the lower end of the windproof barrier cable, the lower end of the windproof barrier cable is installed at the second hanging point (1002) on the tower body of the transmission tower; The damping device (4) is located at the lower end of the windproof barrier cable.

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