High-insulation composite integrally-formed mutual inductor shell

Abstract

The utility model provides a high-insulation composite integrally-formed mutual inductor shell which comprises an outer shell, a top cover is arranged on the top of the outer shell, the top cover and the outer shell are welded and fixed, a cooling cavity is formed in the inner wall of the outer shell, cooling liquid is filled in the cooling cavity, a water inlet and a water outlet are formed in the side wall of the outer shell, and the water inlet and the water outlet are communicated with each other. The water inlet and the water outlet are communicated with the cooling cavity, the water inlet and the water outlet are respectively connected with the external heat dissipation water tank, the cooling cavity is arranged in the shell, the cooling cavity is filled with the cooling liquid, and the cooling cavity is communicated with the external heat dissipation water tank through the water inlet and the water outlet, so that the shell is circularly cooled, and the heat dissipation efficiency is greatly improved; and through the design of the cooling fins and the auxiliary cooling device, the cooling capacity of the mutual inductor is greatly improved, the working temperature is reduced, and the service life is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of power fittings technology, and in particular to a high-insulation composite integral molded transformer housing. Background Technology

[0002] Instrument transformers are key devices in high-voltage power equipment used for electrical energy measurement, protection, and control. They convert voltage and current through the principle of electromagnetic induction. Their core functions can be summarized as follows:

[0003] Voltage conversion: Proportionally converts high voltage to low voltage (e.g., 100kV→100V) for easy instrument measurement; Current conversion: Proportionally converts large current to small current (e.g., 500A→5A) to ensure the safety of secondary equipment; Electrical isolation: Achieves electrical isolation between the primary and secondary sides through electromagnetic coupling to prevent high voltage from entering the low voltage system.

[0004] Chinese patent document CN202323470978.8 discloses an outdoor silicone rubber current transformer, including a first fixing base, a first fastening bolt, an inclined support plate, a second fixing base, a second fastening bolt, a third fastening bolt, a mounting base, a pre-embedded crossbar, and a current transformer housing. The outer surface of the current transformer housing is coated with an insulating layer. An iron core is fixed to the upper end face of the inside of the current transformer housing, and a winding is fixed to the upper end face of the iron core. A fuse is fixed to the upper end face of the insulating layer, and a skirt is provided on the outer surface of the fuse. The left and right sides of the current transformer housing are fixed with the first fixing base by the first fastening bolt. A mounting base is fixed to the lower end face of the current transformer housing. A casting base is fixed to the inner wall of the mounting base by the third fastening bolt. A casting port is opened on the upper end face of the casting base, and a pre-embedded crossbar is provided inside the casting base. This design facilitates the installation and fixing of the current transformer by installers, and provides good lateral support for the current transformer after installation, preventing damage to the current transformer from external foreign objects during long-term outdoor use.

[0005] However, the above-mentioned patent has certain defects in use. Because the transformer generates a lot of heat inside the housing when it is working, and the transformer of this device is sealed, the heat dissipation efficiency is low, which greatly reduces the heat dissipation effect.

[0006] To address these issues, a high-insulation composite integrally molded transformer housing is proposed. Utility Model Content

[0007] In order to overcome the shortcomings of the existing technology and solve the problem of poor heat dissipation efficiency of sealed current transformers during operation, this utility model provides a high-insulation composite integral molded current transformer housing.

[0008] This utility model is achieved using the following technical solution:

[0009] A high-insulation composite integral molded transformer housing includes an outer shell, a top cover on the top of the outer shell, the top cover and the outer shell being welded and fixed together, a cooling cavity on the inner wall of the outer shell filled with coolant, an inlet and an outlet on the side wall of the outer shell, the inlet and outlet being connected to the cooling cavity, and the inlet and outlet being connected to an external heat dissipation tank respectively.

[0010] Multiple heat sinks are symmetrically arranged on both sides of the outer casing. The heat sinks are evenly spaced, with half of each heat sink located inside the cooling cavity and the other half fixed to the outer side wall of the outer casing.

[0011] The top cover is symmetrically provided with auxiliary heat dissipation devices on both sides. The auxiliary heat dissipation devices include ventilation openings on both sides of the top cover, a rainproof box at the upper end of the ventilation opening, a fan inside the rainproof box, and air vents symmetrically provided on both sides of the rainproof box.

[0012] The top cover has a mounting groove at its center, which is an annular groove, and multiple fastening holes are provided along the center of the groove.

[0013] The front of the housing is provided with an inspection port, which is connected to the interior of the housing. The inspection port is provided with an inspection cover, which is fixedly connected to the inspection port by bolts.

[0014] The present invention has the following advantages over the prior art:

[0015] 1. By setting a cooling chamber inside the casing, the cooling chamber is filled with coolant and connected to an external heat dissipation tank through the inlet and outlet, so as to circulate and cool the casing, which greatly improves the heat dissipation efficiency. Furthermore, through the design of heat sinks and auxiliary heat dissipation devices, the heat dissipation capacity of the current transformer is greatly improved, the operating temperature is reduced, and the service life is extended.

[0016] 2. The design of the access ports and the easy-to-remove access covers simplifies the daily maintenance and troubleshooting process of the equipment. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0018] Figure 2 This is an exploded three-dimensional structural diagram of this utility model;

[0019] Figure 3 This is a front view of the utility model;

[0020] Figure 4 This is a side view of the present invention;

[0021] Figure 5This is a top view of the present invention;

[0022] Figure 6 This is a utility model Figure 5 Schematic diagram of the cross section along the AA direction;

[0023] In the diagram: 1. Outer shell; 11. Inspection port; 12. Inspection cover; 2. Top cover; 21. Ventilation opening; 22. Mounting slot; 23. Fastening hole; 3. Rainproof box; 31. Air vent grille; 32. Fan; 4. Mounting plate; 41. Anti-slip pad; 5. Heat sink; 6. Water inlet; 7. Water outlet; 8. Cooling chamber. Detailed Implementation

[0024] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0025] The present invention will be further described below with reference to the accompanying drawings.

[0026] like Figures 1 to 6 As shown, a high-insulation composite integrally molded instrument transformer housing includes an outer shell 1. The outer shell 1, as the main structure of the instrument transformer housing, is made of a high-insulation composite material, such as epoxy resin-based composite material. This material not only has excellent electrical insulation properties but also good mechanical strength and heat resistance. The top of the outer shell 1 is provided with a top cover 2, which is welded to the outer shell 1. The welding connection ensures the integrity and sealing of the structure. The inner wall of the outer shell 1 is provided with a cooling cavity 8, which is filled with coolant. The coolant can be pure water or an aqueous solution of ethylene glycol. The coolant can effectively absorb and remove the heat generated during the operation of the instrument transformer. The side wall of the outer shell 1 is provided with a water inlet 6 and a water outlet 7, which are connected to the cooling cavity 8. The water inlet 6 and the water outlet 7 are respectively connected to an external heat dissipation tank. The heat dissipation tank is usually provided with heat dissipation elements such as heat sinks 5 and fans 32 to dissipate the heat in the coolant into the air. This design can form a circulating cooling system to continuously provide cooling medium for the cooling cavity 8.

[0027] Multiple heat sinks 5 are symmetrically arranged on both sides of the outer casing 1. The heat sinks 5 are evenly spaced, with half of each heat sink 5 located inside the cooling cavity 8 and the other half fixed to the outer side wall of the outer casing 1. The heat sinks 5 are typically designed to be thin and wide to increase the heat dissipation area. They transfer the heat in the coolant to the outside of the outer casing 1 through heat conduction, and then dissipate it into the air through natural convection or forced convection by the fan 32. This design not only increases the heat dissipation area, but also further improves the heat dissipation efficiency through the heat conduction of the coolant.

[0028] The top cover 2 is symmetrically provided with auxiliary heat dissipation devices on both sides. The auxiliary heat dissipation devices include ventilation openings 21 on both sides of the top cover 2. A rainproof box 3 is provided at the upper end of the ventilation opening 21. A fan 32 is provided inside the rainproof box 3. Air vent grilles 31 are symmetrically provided on both sides of the rainproof box 3. The ventilation openings 21 allow air to circulate. The rainproof box 3 protects the fan 32 from rain. When the fan 32 is working, it promotes airflow and exhausts hot air through the air vent grilles 31, forming an additional heat dissipation path.

[0029] The top cover 2 has a mounting groove 22 at the center of its upper surface. The mounting groove 22 is an annular groove, and multiple fastening holes 23 are provided along the center of the groove to facilitate the installation and fixation of the transformer body and ensure structural stability.

[0030] The front of the outer casing 1 is provided with an inspection port 11, which is connected to the interior of the outer casing 1. An inspection cover 12 is provided on the inspection port 11, and the inspection cover 12 is fixedly connected to the inspection port 11 by bolts. The setting of the inspection cover 12 facilitates daily maintenance and troubleshooting. The setting of the inspection cover 12 and the fixed connection of the inspection cover 12 to the inspection port 11 by bolts ensures both airtightness and easy opening.

[0031] The working principle of this utility model is as follows: When in use, the sensor housing is installed, filled with coolant, and the cooling system (including inlet 6, outlet 7, and external heat dissipation tank) is connected and in standby mode.

[0032] The transformer body has been installed in the mounting slot 22 on the top of the housing and fixed by the fastening hole 23. The auxiliary heat dissipation device (fan 32 and vent 21) is in the off state. The inspection port 11 and inspection cover 12 have been closed and fixed.

[0033] When the current transformer starts working, it generates heat inside, causing the coolant temperature to rise. The coolant circulates in the cooling chamber 8 and transfers heat to the outer casing 1 and heat sink 5 through heat conduction. The external heat sink is connected to the cooling chamber 8 through the inlet 6 and outlet 7 to form a coolant circulation. The coolant in the heat sink dissipates heat into the air through the action of the heat sink 5 and the fan 32.

[0034] When the ambient temperature is high or the transformer is under heavy load, the coolant temperature continues to rise, the heat dissipation demand increases, the auxiliary heat dissipation device is activated, the fan 32 starts to rotate, and the airflow is generated through the vent 21 to promote air flow and increase heat dissipation efficiency. The heat sink 5 transfers the heat in the coolant to the outside of the casing 1, and dissipates the heat into the air through natural convection or forced convection by the fan 32.

[0035] When inspection or maintenance is required, open the inspection port 11 and the inspection cover 12 to enter the housing for operation. After completion, close the inspection cover 12 and secure it to ensure the housing's sealing and safety.

[0036] The above embodiments are merely preferred embodiments of this utility model and should not be construed as limiting the scope of protection of this utility model. Any non-substantial changes and substitutions made by those skilled in the art based on this utility model shall fall within the scope of protection claimed by this utility model.

Claims

1. A high insulation composite integrally formed mutual inductor housing, comprising a shell (1), a top cover (2) is arranged on the top of the shell (1), and the top cover (2) and the shell (1) are welded and fixed, characterized in that, The inner wall of the shell (1) is provided with a cooling cavity (8) filled with cooling liquid, the side wall of the shell (1) is provided with a water inlet (6) and a water outlet (7), the water inlet (6) and the water outlet (7) are communicated with the cooling cavity (8), and the water inlet (6) and the water outlet (7) are connected with external heat dissipation water tanks respectively.

2. A high insulation composite integrally formed mutual inductor housing according to claim 1, characterized in that: A plurality of cooling fins (5) are symmetrically arranged on the two side walls of the shell (1), the cooling fins (5) are uniformly and equidistantly arranged, and half of the cooling fins (5) are located in the cooling cavity (8) and the other half are fixed on the outer side wall of the shell (1).

3. The high insulation composite integrally formed mutual inductor housing according to claim 1, characterized in that: Auxiliary heat dissipation devices are symmetrically arranged on the two sides of the top cover (2), the auxiliary heat dissipation devices comprise ventilation openings (21) arranged on the two sides of the top cover (2), the ventilation openings (21) are provided with rainproof boxes (3) at the upper ends, the rainproof boxes (3) are internally provided with fans (32), and air outlet grilles (31) are symmetrically arranged on the two sides of the rainproof boxes (3).

4. The high insulation composite integrally formed mutual inductor housing according to claim 1, characterized in that: A mounting groove (22) is arranged at the center of the upper surface of the top cover (2), the mounting groove (22) is an annular groove, a plurality of fastening holes (23) are arranged along the center of the mounting groove (22).

5. The high insulation composite integrally formed mutual inductor housing of claim 1, wherein: The front surface of the shell (1) is provided with an inspection opening (11), the inspection opening (11) is communicated with the inside of the shell (1), the inspection opening (11) is provided with an inspection cover (12), and the inspection cover (12) and the inspection opening (11) are fixedly connected through bolts.

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