Live 500kV insulator dynamic icing simulation device
By designing an airflow organization and rotation device with four-sided air supply and top return air, the problems of low and uneven icing efficiency in ultra-high voltage insulator icing experiments were solved, achieving a more efficient and uniform icing effect and ensuring the accuracy of the experiment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-27
- Publication Date
- 2026-03-10
AI Technical Summary
Existing technologies suffer from low icing efficiency and uneven icing in ultra-high voltage insulator icing experiments, especially in large-space test chambers, where airflow organization design affects temperature uniformity and the spraying effect of icing solution.
A dynamic icing simulation device for energized 500kV insulators was adopted, and an airflow organization pattern of four-sided air supply and top return was designed. Electric air valves and circulating fans were used for airflow management, and a rotating device was used to ensure 360° rotation of the insulator string, eliminating the need for an aerodynamic air supply fan and improving the uniformity and efficiency of icing.
It improved the icing efficiency and uniformity of the insulator icing experiment, ensured the accuracy of the insulator icing performance study, and reduced the impact of dead air zones and temperature inhomogeneity in the experimental chamber.
Smart Images
Figure CN121633670A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to a device for simulating dynamic icing of insulators. Background Technology
[0002] The performance of insulators is crucial to ensuring the safe operation of power systems. Testing the icing performance of insulators in real-world environments is challenging. Currently, most methods involve conducting artificial icing experiments in artificial climate laboratories. However, for ultra-high voltage insulator testing in ultra-large spaces, it is necessary to ensure the ultra-high voltage safety distance while also ensuring that the icing solution sprayed from the icing nozzles falls evenly onto the insulator strings. This requirement raises the difficulty level of insulator icing compared to medium- and high-voltage artificial climate chambers. Furthermore, the design of airflow organization in large-space test chambers significantly affects the temperature uniformity, and consequently, the icing uniformity. Traditional airflow organization in large-space test chambers often employs top-supply and side-bottom-return or four-sided bottom-return configurations. While this approach achieves good airflow uniformity, it has significant shortcomings in insulator icing tests within large-space test chambers. This is because insulator icing tests require solution spraying from the sides of the insulators. However, the spraying distance of the nozzles is relatively long, necessitating the use of aerodynamic fans. The airflow direction generated by these fans clashes with the airflow directions of the top-supply, side-bottom-return, or four-sided bottom-return configurations within the large-space test chamber. This not only affects the temperature uniformity and stability within the chamber but also severely impacts whether the icing solution can be fully sprayed onto the insulator strings, resulting in low icing efficiency and uneven icing. Summary of the Invention
[0003] To address the problems of low icing efficiency and uneven icing when using artificial climate chambers to test the icing performance of insulators, this invention proposes a dynamic icing simulation device for energized 500kV insulators.
[0004] The present invention provides a dynamic icing simulation device for 500kV insulators, comprising an experimental chamber (1), a temperature control system (2), a hoisting component (3), and an icing nozzle (4).
[0005] The experimental chamber (1) is formed by the facade enclosure (14), the top enclosure (15) and the floor (16); a top return air panel (18) is provided in the upper part of the experimental chamber (1), and a return air layer (13) is formed between the top return air panel (18) and the top enclosure (15); the experimental area (11) is below the top return air panel (18); vertical partitions (17) are provided at the four corners of the experimental chamber (1), and the partitions (17) and the facade enclosure (14) form a circulating air treatment area (12); multiple icing nozzles (4) are installed in the middle of the partitions (17), and air outlets (19) are provided next to the icing nozzles (4) on the partitions (17); a temperature control system (2) is provided in the upper part of the circulating air treatment area (12).
[0006] The temperature control system (2) consists of an electric air valve (21), a circulating fan (22), a stainless steel heater (23), and an evaporator (24). The electric air valve (21), the circulating fan (22), the stainless steel heater (23), and the evaporator (24) are arranged from top to bottom. The electric air valve (21) is located on the top return air plate (18) at the top of the circulating air treatment area (12). A hoisting component (3) is located in the center of the top enclosure plate (15). An upper suspension wire is connected to the hoisting component (3). A rotating device (31) is connected to the lower end of the upper suspension wire. An insulator string (32) is suspended at the lower end of the rotating device (31). The insulator string (32) is located in the experimental area (11). The rotating device (31) is located in the return air layer (13). Multiple return air inlets are located in the center of the top return air plate (18).
[0007] The principle and beneficial effects of this invention are as follows:
[0008] This invention's experimental chamber features a four-sided air supply and top return airflow design, eliminating the need for the aerodynamic fans required in traditional artificial climate chamber insulator icing devices. Temperature control systems are located at the four corners of the chamber. When one of the evaporators requires defrosting, the corresponding electric air valve is closed to initiate defrosting. The other three temperature control systems maintain the required temperature within the experimental area and provide the power supply for the icing solution. In this invention, airflow enters the circulating air treatment area via electric air valves, is guided by guide plates, and exits through the air supply outlets. The airflow then returns to the return air layer via the return air outlet on the top return air plate, avoiding dead zones. The circulating fan used for indoor air circulation in the experimental chamber is used as the aerodynamic air supply fan, reducing the need for conventional insulator icing auxiliary devices and improving the icing efficiency of the insulators in the experimental chamber. A rotating device under the hoisting components ensures 360° rotation of the insulator strings, improving the uniformity of icing and further ensuring the accuracy of insulator icing performance studies. Attached Figure Description
[0009] Figure 1This is a schematic diagram (elevation) of the structure of the dynamic icing simulation device for a 500kV energized insulator in Example 1;
[0010] Figure 2 This is a horizontal schematic diagram of the structure of the dynamic icing simulation device for a 500kV insulator in Example 1. Detailed Implementation
[0011] The technical solution of the present invention is not limited to the specific embodiments listed below, but also includes any reasonable combination of the specific embodiments.
[0012] Specific implementation method one: The 500kV live insulator dynamic icing simulation device in this implementation method includes an experimental chamber (1), a temperature control system (2), a hoisting component (3), and an icing nozzle (4).
[0013] The experimental chamber (1) is formed by the facade enclosure (14), the top enclosure (15) and the floor (16); a top return air panel (18) is provided in the upper part of the experimental chamber (1), and a return air layer (13) is formed between the top return air panel (18) and the top enclosure (15); the experimental area (11) is below the top return air panel (18); vertical partitions (17) are provided at the four corners of the experimental chamber (1), and the partitions (17) and the facade enclosure (14) form a circulating air treatment area (12); multiple icing nozzles (4) are installed in the middle of the partitions (17), and air outlets (19) are provided next to the icing nozzles (4) on the partitions (17); a temperature control system (2) is provided in the upper part of the circulating air treatment area (12).
[0014] The temperature control system (2) consists of an electric air valve (21), a circulating fan (22), a stainless steel heater (23), and an evaporator (24). The electric air valve (21), the circulating fan (22), the stainless steel heater (23), and the evaporator (24) are arranged from top to bottom. The electric air valve (21) is located on the top return air plate (18) at the top of the circulating air treatment area (12). A hoisting component (3) is located in the center of the top enclosure plate (15). An upper suspension wire is connected to the hoisting component (3). A rotating device (31) is connected to the lower end of the upper suspension wire. An insulator string (32) is suspended at the lower end of the rotating device (31). The insulator string (32) is located in the experimental area (11). The rotating device (31) is located in the return air layer (13). Multiple return air inlets are located in the center of the top return air plate (18).
[0015] This embodiment of the experimental chamber features a four-sided air supply and top return airflow design, eliminating the need for the aerodynamic fans required in traditional artificial climate chamber insulator icing devices. Temperature control systems are located at the four corners of the experimental chamber. When one of the evaporators in the four temperature control systems needs defrosting, the corresponding electric air valve is closed for defrosting. The other three temperature control systems maintain the required temperature within the experimental area and provide the power supply for the icing solution. In this embodiment, airflow enters the circulating air treatment area through electric air valves, is guided by baffles, and exits through the air supply outlets. The airflow then returns to the return air layer through the return air outlets on the top return air plate, avoiding dead airflow zones. The circulating fan used for indoor air circulation in the experimental chamber is used as the aerodynamic air supply fan, reducing the need for conventional insulator icing auxiliary devices and improving the icing efficiency of the insulators in the experimental chamber. A rotating device under the hoisting components ensures 360° rotation of the insulator strings, improving the uniformity of icing and further ensuring the accuracy of insulator icing performance studies.
[0016] Specific implementation method two: This implementation method differs from specific implementation method one in that: the bottom of the circulating air treatment area (12) is provided with a guide plate (20), and the guide plate (20) is arc-shaped.
[0017] Specific implementation method three: This implementation method differs from specific implementation method one or two in that the rotating device (31) is a motor, which can make the insulator string (32) rotate 360° to ensure that the insulator string (32) is evenly covered with ice during the defrosting process.
[0018] Specific implementation method four: This implementation method differs from one of the specific implementation methods one to three in that: the ice-covering nozzles (4) on the partition plate (17) are arranged in an array, and the nozzles of the ice-covering nozzles (4) face the insulator string (32).
[0019] Specific implementation method five: This implementation method differs from specific implementation methods one to four in that: the icing nozzle (4) is installed on the outside of the partition plate (17) in the middle of the circulating air treatment area (12), and multiple nozzles (4) are arranged in an array, with the nozzle nozzles facing the insulator string (32); during icing, the airflow discharged from the air outlet (19) delivers the icing solution to the insulator string (32).
[0020] Specific implementation method six: This implementation method differs from one of the specific implementation methods one to five in that the ice spray nozzle (4) is made of 303 stainless steel, which can further ensure the service life in low temperature ice environment.
[0021] Specific implementation method seven: This implementation method differs from one of the specific implementation methods one to six in that the temperature control system (2) uses a stainless steel heater (23) to generate hot air for defrosting.
[0022] Specific implementation method eight: This implementation method differs from one of the specific implementation methods one to seven in that: the evaporator (24) in the temperature control system (2) adopts a water-cooled direct expansion unit, and the evaporator (24) is used to control the low temperature environment when the insulators of the experimental chamber are covered with ice.
[0023] Example 1:
[0024] The 500kV live insulator dynamic icing simulation device in this embodiment includes an experimental chamber (1), a temperature control system (2), a hoisting component (3), and an icing nozzle (4).
[0025] The experimental chamber (1) is formed by a facade enclosure panel (14), a top enclosure panel (15), and a floor (16). A top return air panel (18) is installed in the upper part of the experimental chamber (1), and a return air layer (13) is formed between the top return air panel (18) and the top enclosure panel (15). The experimental area (11) is located below the top return air panel (18). Vertical partition panels (17) are installed at the four corners of the experimental chamber (1), and the partition panels (17) and the facade enclosure panel (14) together form a circulating air treatment area (12). Multiple icing nozzles (4) are installed in the middle of the partition panels (17), and air outlets (19) are installed next to the icing nozzles (4) on the partition panels (17). Ice is applied to the partition panels (17). The nozzles (4) are arranged in an array, with the nozzles of the icing nozzles (4) facing the insulator string (32). During icing, the icing nozzles (4) are installed on the outside of the partition plate (17) in the middle of the circulating air treatment area (12). Multiple nozzles (4) are arranged in an array, with the nozzles facing the insulator string (32). During icing, the airflow discharged from the air outlet (19) delivers the icing solution to the insulator string (32). The icing nozzles (4) are made of 303 stainless steel, which can further ensure the service life in the low-temperature icing environment. A temperature control system (2) is provided on the upper part of the circulating air treatment area (12). A guide plate (20) is provided at the bottom of the circulating air treatment area (12). The guide plate (20) is arc-shaped.
[0026] The temperature control system (2) consists of an electric air valve (21), a circulating fan (22), a stainless steel heater (23), and an evaporator (24). The electric air valve (21), the circulating fan (22), the stainless steel heater (23), and the evaporator (24) are arranged sequentially from top to bottom. The electric air valve (21) is located on the top return air plate (18) at the top of the circulating air treatment area (12). A hoisting component (3) is located at the center of the top enclosure plate (15). An upper suspension wire is connected to the hoisting component (3), and a rotating device (31) is connected to the lower end of the upper suspension wire. The rotating device (31) is a motor that can... The insulator string (32) is rotated 360° to ensure that the insulator string (32) is evenly covered with ice during the defrosting process; the insulator string (32) is suspended at the lower end of the rotating device (31); the insulator string (32) is set in the experimental area (11); the rotating device (31) is set in the return air layer (13); multiple return air vents are set in the center of the top return air plate (18); the temperature control system (2) uses a stainless steel heater (23) to generate hot air for defrosting; the evaporator (24) in the temperature control system (2) uses a water-cooled direct expansion unit, and the evaporator (24) is used to control the low temperature environment when the insulators in the experimental chamber are covered with ice.
[0027] This embodiment of the experimental chamber features a four-sided air supply and top return airflow design, eliminating the need for the aerodynamic fans required in traditional artificial climate chamber insulator icing devices. Temperature control systems are located at the four corners of the experimental chamber. When one of the evaporators in the four temperature control systems needs defrosting, the corresponding electric air valve is closed for defrosting. The other three temperature control systems maintain the required temperature within the experimental area and provide the power supply for the icing solution. In this embodiment, airflow enters the circulating air treatment area through electric air valves, is guided by baffles, and exits through the air supply outlets. The airflow then returns to the return air layer through the return air outlets on the top return air plate, avoiding dead airflow zones. Using the circulating fan for indoor air circulation in the experimental chamber as an aerodynamic fan reduces the need for conventional insulator icing auxiliary devices and improves the icing efficiency of the insulators in the experimental chamber. A rotating device under the hoisting components ensures 360° rotation of the insulator strings, improving the uniformity of icing and further ensuring the accuracy of insulator icing performance studies.
Claims
1. A dynamic icing simulation device for a live 500 kV insulator, characterized in that: The device comprises an experimental cabin (1), a temperature control system (2), a lifting part (3) and an icing nozzle (4). The experimental cabin (1) is formed by a vertical enclosure panel (14), a top enclosure panel (15) and a floor (16); a top air return panel (18) is arranged at the upper portion of the experimental cabin (1), and the top air return panel (18) and the top enclosure panel (15) form an air return layer (13); the experimental area (11) is below the top air return panel (18); vertical partition panels (17) are arranged at the four corners of the experimental cabin (1), and the partition panels (17) and the vertical enclosure panel (14) form a circulating air treatment area (12); a plurality of icing nozzles (4) are installed at the middle portion of the partition panels (17), and air supply ports (19) are arranged beside the icing nozzles (4) on the partition panels (17); the temperature control system (2) is arranged at the upper portion of the circulating air treatment area (12). The temperature control system (2) comprises an electric air valve (21), a circulating fan (22), a stainless steel heater (23) and an evaporator (24); the electric air valve (21), the circulating fan (22), the stainless steel heater (23) and the evaporator (24) are sequentially arranged from top to bottom, and the electric air valve (21) is arranged on the top air return panel (18) at the top of the circulating air treatment area (12); the lifting part (3) is arranged at the center of the top enclosure panel (15), and an upper suspension conductor is connected to the lifting part (3); a rotating device (31) is connected to the lower end of the upper suspension conductor, and an insulator string (32) is suspended from the lower end of the rotating device (31); the insulator string (32) is arranged in the experimental area (11); the rotating device (31) is arranged in the air return layer (13); and a plurality of air return ports are arranged at the center of the top air return panel (18).
2. The dynamic icing simulation device of charged 500 kV insulator according to claim 1, characterized in that: The bottom of the circulating air treatment area (12) is provided with a flow guide plate (20), and the flow guide plate (20) is arc-shaped.
3. The dynamic icing simulation device of charged 500 kV insulator according to claim 1, characterized in that: The rotating device (31) is an electric motor, which can rotate the insulator string (32) by 360 degrees, and ensure that the insulator string (32) is uniformly iced during the defrosting process.
4. The dynamic icing simulation device of a live 500 kV insulator according to claim 1, characterized in that: The icing nozzles (4) on the partition panels (17) are arranged in an array, and the nozzles of the icing nozzles (4) face the insulator string (32).
5. The dynamic icing simulation device of charged 500 kV insulator according to claim 1, characterized in that: The icing nozzles (4) are installed on the outer side of the partition panels (17) at the middle portion of the circulating air treatment area (12), and the nozzles are arranged in an array and face the insulator string (32); during icing, the air flow discharged from the air supply ports (19) carries the icing solution to the insulator string (32).
6. The dynamic icing simulation device of charged 500 kV insulator according to claim 1, characterized in that: The icing nozzles (4) are made of 303 stainless steel material, which can further ensure the service life in a low-temperature icing environment.
7. The dynamic icing simulation device of charged 500 kV insulator according to claim 1, characterized in that: The temperature control system (2) uses the stainless steel heater (23) to generate hot air for defrosting.
8. The dynamic icing simulation device of charged 500 kV insulator according to claim 1, characterized in that: The evaporator (24) in the temperature control system (2) is a water-cooled direct expansion unit, and the evaporator (24) is used to control the low-temperature environment of the experimental cabin during icing of the insulator.