Outdoor high-voltage combined mutual inductor

Abstract

The utility model discloses an outdoor high -voltage combined mutual -inductor, including metal shell, first conducting rod, second conducting rod and insulating sleeve, the inside of metal shell is provided with voltage transformer and current transformer respectively, and the both ends of metal shell top are provided with first conducting rod respectively, the central position of metal shell top is provided with second conducting rod, and the outside of first conducting rod and second conducting rod all is provided with insulating sleeve, the insulating sleeve is composed of core rod, big umbrella skirt and small umbrella skirt, the big umbrella skirt and small umbrella skirt all are distributed on the core rod, and the surface of big umbrella skirt is evenly provided with water guide groove, the root of big umbrella skirt all is embedded with electric heating wire. The utility model discloses through being provided with metal shell, first conducting rod, second conducting rod, insulating sleeve, big umbrella skirt, small umbrella skirt, core rod, electric heating wire and water guide groove, can effectively avoid the insulation performance decline caused by rainwater, reduces the risk of surface flashover.

Description

Technical Field

[0001] This utility model relates to the field of high voltage combined instrument transformer technology, specifically an outdoor high voltage combined instrument transformer. Background Technology

[0002] An outdoor high-voltage combined instrument transformer is a device used in outdoor high-voltage power systems. It combines a voltage transformer and a current transformer and is mainly used for energy metering, measurement, and relay protection in three-phase AC power systems with rated voltages of 6kV to 35kV and frequencies of 50-60Hz.

[0003] Outdoor high-voltage combined instrument transformers are exposed to complex and ever-changing natural environments for extended periods, facing multiple challenges such as rain and extreme cold. Rainwater easily forms a water film along the surface of the conductive rod, damaging the insulation gaps and reducing the wet flashover voltage of the equipment, thereby triggering phase-to-phase or phase-to-ground discharge. Moreover, in low-temperature environments, the skirts are prone to icing. The ice layer not only significantly reduces the insulation performance of the equipment but also increases the weight, placing additional loads on the conductive rods and causing mechanical stress damage. Therefore, improvements are needed. Utility Model Content

[0004] The purpose of this utility model is to provide an outdoor high-voltage combined transformer to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an outdoor high-voltage combined transformer, comprising a metal shell, a first conductive rod, a second conductive rod, and an insulating sleeve. A voltage transformer and a current transformer are respectively disposed inside the metal shell, and the voltage transformer and current transformer are sealed to the metal shell by an epoxy resin filling layer. The first conductive rod is disposed at both ends of the top of the metal shell, and a second conductive rod is disposed at the center of the top of the metal shell. An insulating sleeve is disposed on the outer side of both the first and second conductive rods. The insulating sleeve consists of a core rod, a large umbrella skirt, and a small umbrella skirt. The core rod is disposed outside the first and second conductive rods, and the core rod has large and small umbrella skirts distributed on it. Water-guiding grooves are evenly formed on the surface of the large umbrella skirt, and heating wires are embedded at the base of each large umbrella skirt. A temperature sensor is disposed at the center of one side of the metal shell.

[0006] Preferably, both the large and small umbrella skirts are made of silicone rubber, and the large and small umbrella skirts are arranged on the mandrel in an alternating manner.

[0007] Preferably, the core rods are all tightly fitted onto the first conductive rod and the second conductive rod with epoxy resin adhesive, and the core rods are all made of glass fiber material.

[0008] Preferably, the water guide channel is opened along the slope of the large umbrella skirt, and the interior of the water guide channel is uniformly coated with a nano-superhydrophobic layer.

[0009] Preferably, the metal casing is made of aluminum alloy, and heat dissipation grooves are evenly provided on both sides of the metal casing.

[0010] Preferably, movable plates are provided on both sides of the metal casing, and cleaning brushes are provided on the side of the movable plates closest to the heat dissipation groove.

[0011] Preferably, a lead screw and a guide rod are respectively mounted on the metal shells on both sides of the movable plate via brackets, and a drive block and a guide sleeve are respectively sleeved on the lead screw and the guide rod, and the drive block and the guide sleeve are respectively connected to both sides of the movable plate.

[0012] Preferably, a drive motor is provided on the metal casing below the lead screw, and the output end of the drive motor is connected to the lead screw.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: This outdoor high-voltage combined transformer is equipped with a metal shell, a first conductive rod, a second conductive rod, a temperature sensor, an insulating sleeve, a large umbrella skirt, a small umbrella skirt, a core rod, a heating wire, and water guide grooves. Insulating sleeves are installed on both the first and second conductive rods. The insulating sleeves are composed of a core rod, a large umbrella skirt, and a small umbrella skirt. The core rod is made of glass fiber, which provides solid mechanical support for the insulating sleeve, firmly supporting the first and second conductive rods and maintaining the overall structural stability of the equipment. The large umbrella skirt is used for rain protection, while the small umbrella skirt increases the creepage distance. Water guide grooves are evenly opened on the surface of the large umbrella skirt, which can draw water... Rainwater is guided to flow rapidly along the channel to the edge of the large umbrella skirt, preventing rainwater from accumulating on a large area of ​​the umbrella skirt surface. The large and small umbrella skirts are arranged in an alternating manner to increase the creepage distance and prevent dirt from forming a continuous conductive channel on the surface of the conductive rod. This effectively avoids the decrease in insulation performance caused by rainwater and reduces the risk of surface flashover. In addition, heating wires are embedded at the base of the large umbrella skirt. When energized, heat is generated, which raises the temperature of the large umbrella skirt through heat conduction, preventing rainwater or moisture from freezing on the surface. Even if a small amount of ice has formed, the heat can melt the ice layer, keeping the surface of the large umbrella skirt dry and maintaining the creepage distance and insulation performance of the insulating sleeve. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1This is a front view structural diagram of the present utility model;

[0016] Figure 2 This is a top view of the first conductive rod of this utility model;

[0017] Figure 3 This is a top view cross-sectional structural diagram of the large umbrella skirt of this utility model;

[0018] Figure 4 This is a schematic diagram of the cross-sectional structure of the metal shell of this utility model;

[0019] Figure 5 This is a side view of the structure of this utility model.

[0020] In the diagram: 1. Metal casing; 2. First conductive rod; 3. Second conductive rod; 4. Insulating sleeve; 5. Large umbrella skirt; 6. Small umbrella skirt; 7. Temperature sensor; 8. Lead screw; 9. Drive block; 10. Drive motor; 11. Water guide channel; 12. Nano-superhydrophobic layer; 13. Heating wire; 14. Voltage transformer; 15. Current transformer; 16. Epoxy resin filling layer; 17. Heat dissipation groove; 18. Guide sleeve; 19. Movable plate; 20. Cleaning brush; 21. Guide rod; 22. Core rod. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0022] Please see Figure 1-5 An embodiment of this utility model is provided: an outdoor high voltage combined transformer, including a metal shell 1, a first conductive rod 2, a second conductive rod 3 and an insulating sleeve 4. A voltage transformer 14 and a current transformer 15 are respectively arranged inside the metal shell 1, and the voltage transformer 14 and the current transformer 15 are sealed to the metal shell 1 by an epoxy resin filling layer 16.

[0023] The metal casing 1 has a first conductive rod 2 at each of its two ends at the top, and a second conductive rod 3 at the center of the top of the metal casing 1.

[0024] The high-voltage line current is introduced through the first conductive rods 2 on the left and right sides and transmitted to the primary side of the current transformer 15 inside the metal casing 1. It is converted into a small current output on the secondary side by electromagnetic induction. The high-voltage line voltage is introduced through the second conductive rod 3 in the center and transmitted to the primary side of the voltage transformer 14 inside the metal casing 1. It is converted into a low voltage output on the secondary side by electromagnetic induction.

[0025] Insulating sleeves 4 are provided on the outer sides of both the first conductive rod 2 and the second conductive rod 3. The insulating sleeves 4 are composed of a core rod 22, a large umbrella skirt 5 and a small umbrella skirt 6, and the core rod 22 is located on the outside of the first conductive rod 2 and the second conductive rod 3.

[0026] The core rods 22 are tightly fitted onto the first conductive rod 2 and the second conductive rod 3 with epoxy resin. The core rods 22 are made of glass fiber material, which provides mechanical support for the insulating sleeve 4, ensures the stability of the overall structure, and isolates the high voltage of the first conductive rod 2 and the second conductive rod 3 to prevent current leakage.

[0027] Large umbrella skirts 5 and small umbrella skirts 6 are distributed on the core rod 22, and the large umbrella skirts 5 and small umbrella skirts 6 are arranged on the core rod 22 in a way that alternating between large and small sizes;

[0028] The large umbrella skirt 5 blocks rain, while the small umbrella skirt 6 increases the creepage distance. Together, they increase the creepage distance, preventing dirt from forming a conductive path. Both the large umbrella skirt 5 and the small umbrella skirt 6 are made of silicone rubber, which has excellent hydrophobicity. Rainwater will form droplets and roll off when it falls on the surface, making it difficult to form a continuous water film. In addition, silicone rubber has good elasticity, preventing the large umbrella skirt 5 and the small umbrella skirt 6 from cracking and hardening due to temperature changes, thus ensuring the continuity of insulation protection.

[0029] The surface of the large umbrella skirt 5 is uniformly provided with water guiding grooves 11. The water guiding grooves 11 are opened along the slope of the large umbrella skirt 5, which can guide rainwater to flow quickly to the edge and avoid large-area stagnation. The interior of the water guiding grooves 11 is uniformly coated with a nano superhydrophobic layer 12, which further enhances the hydrophobic effect.

[0030] Heating wires 13 are embedded at the base of the large umbrella skirt 5, and a temperature sensor 7 is set at the center of one side of the metal shell 1.

[0031] When the ambient temperature is low, the heating wire 13 at the base of the large umbrella skirt 5 is energized and heats up. Heat conduction prevents ice from forming on the surface of the large umbrella skirt 5 and maintains insulation performance. The temperature sensor 7 on one side of the metal shell 1 monitors the ambient temperature in real time and feeds back the data. If the temperature is lower than the set threshold, the system controls the heating wire 13 to start heating; if the temperature is normal, the heating wire 13 remains off.

[0032] The metal casing 1 is made of aluminum alloy, which has good thermal conductivity. The metal casing 1 has heat dissipation grooves 17 evenly distributed on both sides, which forms a concave-convex structure on the surface of the metal casing 1, increases the air flow path, promotes air convection, and accelerates heat dissipation. This helps to dissipate internal heat and maintain the normal operating temperature of the equipment.

[0033] Movable plates 19 are provided on both sides of the metal casing 1, and cleaning brushes 20 are provided on the side of the movable plates 19 closest to the heat dissipation groove 17.

[0034] On both sides of the movable plate 19, the metal shell 1 is provided with a lead screw 8 and a guide rod 21 respectively via a bracket, and the lead screw 8 and the guide rod 21 are respectively fitted with a drive block 9 and a guide sleeve 18, which are connected to both sides of the movable plate 19 respectively.

[0035] Each of the metal housings 1 below the lead screw 8 is equipped with a drive motor 10, and the output end of each drive motor 10 is connected to the lead screw 8.

[0036] By periodically turning on the drive motor 10, the lead screw 8 is rotated, the drive block 9 moves along the lead screw 8, and at the same time the guide sleeve 18 slides on the guide rod 21, driving the movable plate 19 to move. The cleaning brush 20 is used to clean the heat dissipation slot 17 to prevent dust and debris from clogging and affecting the heat dissipation effect.

[0037] The specific models and specifications of the temperature sensor 7, drive motor 10, and heating wire 13 need to be determined based on the specifications and parameters of the device. The selection and calculation method is existing technology, so it will not be described in detail here.

[0038] Working Principle: In this embodiment, the high-voltage line current is introduced through the first conductive rods 2 on both sides and transmitted to the primary side of the current transformer 15 inside the metal casing 1. It is then converted into a small current output on the secondary side via electromagnetic induction. The high-voltage line voltage is introduced through the second conductive rod 3 in the center and transmitted to the primary side of the voltage transformer 14 inside the metal casing 1. It is then converted into a low voltage output on the secondary side via electromagnetic induction. The insulating sleeve 4 outside the first conductive rods 2 and 3 consists of a core rod 22, a large umbrella skirt 5, and a small umbrella skirt 6. The core rod 22 is made of fiberglass, providing mechanical support for the insulating sleeve 4 to ensure overall structural stability. It also isolates the high voltage of the first conductive rods 2 and 3, preventing current leakage. The large umbrella skirt 5 and small umbrella skirt 6, made of silicone rubber, are arranged on the core rod 22 at varying intervals. The large umbrella skirt 5 provides rain protection, while the small umbrella skirt 6 increases the creepage distance. Together, they increase the creepage distance, preventing dirt from forming a conductive path. The surface of the large umbrella skirt 5... The water guide channel 11 guides rainwater to flow quickly to the edge, avoiding large-area stagnation. The nano-superhydrophobic layer 12 inside the water guide channel 11 further enhances the hydrophobic effect. When the ambient temperature is low, the heating wire 13 at the base of the large umbrella skirt 5 is energized and heats up. Heat conduction prevents ice formation on the surface of the large umbrella skirt 5 and maintains insulation performance. The temperature sensor 7 on one side of the metal shell 1 monitors the ambient temperature in real time and feeds back the data. If the temperature is lower than the set threshold, the system controls the heating wire 13 to start heating. If the temperature is normal, the heating wire 13 remains off. The metal shell 1 is made of aluminum alloy, which has good heat dissipation. At the same time, the heat dissipation slots 17 on both sides assist in the dissipation of internal heat and maintain the normal operating temperature of the equipment. In addition, by periodically turning on the drive motor 10, the lead screw 8 is rotated, the drive block 9 moves along the lead screw 8, and the guide sleeve 18 slides on the guide rod 21, driving the movable plate 19 to move. The cleaning brush 20 is used to clean the heat dissipation slots 17 to prevent dust and debris from clogging and affecting the heat dissipation effect.

[0039] Obviously, the embodiments described above are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0040] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0041] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0042] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An outdoor high-voltage combined instrument transformer, characterized in that, The device includes a metal casing (1), a first conductive rod (2), a second conductive rod (3), and an insulating sleeve (4). A voltage transformer (14) and a current transformer (15) are respectively installed inside the metal casing (1). The voltage transformer (14) and the current transformer (15) are sealed to the metal casing (1) by an epoxy resin filling layer (16). The first conductive rod (2) is installed at both ends of the top of the metal casing (1), and the second conductive rod (3) is installed at the center of the top of the metal casing (1). Insulating sleeves (4) are provided on the outer side of the second conductive rod (3). The insulating sleeves (4) are composed of a core rod (22), a large umbrella skirt (5) and a small umbrella skirt (6). The core rod (22) is located outside the first conductive rod (2) and the second conductive rod (3). The core rod (22) is provided with large umbrella skirts (5) and small umbrella skirts (6). The surface of the large umbrella skirt (5) is uniformly provided with water guiding grooves (11). The root of the large umbrella skirt (5) is embedded with an electric heating wire (13). A temperature sensor (7) is provided at the center of one side of the metal shell (1).

2. The outdoor high-voltage combined instrument transformer according to claim 1, characterized in that: Both the large umbrella skirt (5) and the small umbrella skirt (6) are made of silicone rubber, and the large umbrella skirt (5) and the small umbrella skirt (6) are arranged on the core rod (22) in a way that alternating between large and small sizes.

3. An outdoor high-voltage combined instrument transformer according to claim 1, characterized in that: The core rods (22) are all tightly fitted onto the first conductive rod (2) and the second conductive rod (3) with epoxy resin adhesive, and the core rods (22) are all made of glass fiber material.

4. An outdoor high-voltage combined instrument transformer according to claim 1, characterized in that: The water guide channel (11) is opened along the inclined surface of the large umbrella skirt (5), and the interior of the water guide channel (11) is uniformly coated with a nano superhydrophobic layer (12).

5. An outdoor high-voltage combined instrument transformer according to claim 1, characterized in that: The metal casing (1) is made of aluminum alloy, and heat dissipation grooves (17) are evenly provided on both sides of the metal casing (1).

6. An outdoor high-voltage combined instrument transformer according to claim 5, characterized in that: Movable plates (19) are provided on both sides of the metal casing (1), and cleaning brushes (20) are provided on the side of the movable plates (19) near the heat dissipation groove (17).

7. An outdoor high-voltage combined instrument transformer according to claim 6, characterized in that: On the metal shells (1) on both sides of the movable plate (19), a lead screw (8) and a guide rod (21) are respectively provided by a bracket. A drive block (9) and a guide sleeve (18) are respectively sleeved on the lead screw (8) and the guide rod (21). The drive block (9) and the guide sleeve (18) are respectively connected to the two sides of the movable plate (19).

8. An outdoor high-voltage combined instrument transformer according to claim 7, characterized in that: Each of the metal casings (1) below the lead screw (8) is equipped with a drive motor (10), and the output end of each drive motor (10) is connected to the lead screw (8).

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