Dry-type transformer box body structure with heat dissipation interlayer

Abstract

The application discloses a dry-type transformer box body structure with a heat dissipation interlayer, which comprises a box body, a jacket layer is formed on the box body, and a cold liquid circulating mechanism for circulating cooling liquid in the jacket layer is arranged on the box body. The closed loop formed by the cold liquid circulating mechanism and the jacket layer is used for circulating the cooling liquid to take away the heat in the box body, and the ventilation hole is not needed to be formed, so that the dust and moisture outside is completely prevented from entering the box body, and the insulation failure and the maintenance frequency caused by environmental factors are greatly reduced. The corrugated sound insulation lines printed on the inner wall of the box body and the inner wall of the jacket layer increase the heat exchange area and strengthen the heat conduction efficiency on the one hand, and effectively scatter and absorb electromagnetic noise and mechanical vibration sound waves on the other hand, so that the noise transmission is reduced, and the heat dissipation and sound insulation are synergistically optimized.

Description

Technical Field

[0001] This invention relates to the field of transformer enclosure technology, and more specifically, to a dry-type transformer enclosure structure with a heat dissipation jacket. Background Technology

[0002] Dry-type transformers are widely used in high-rise buildings, subways, data centers, and other locations with high fire protection requirements due to their advantages such as being oil-free, flame-retardant, and environmentally friendly. However, the heat dissipation of dry-type transformers mainly relies on natural convection or forced air cooling, and their heat dissipation efficiency is limited by the airflow and heat exchange area inside the enclosure. In a closed or semi-closed enclosure structure, the heat generated during transformer operation can easily accumulate inside the enclosure, leading to excessive temperature rise and affecting insulation life and operational reliability.

[0003] Common heat dissipation methods in existing technologies include:

[0004] Natural cooling: Relies on the surface of the enclosure to dissipate heat naturally, resulting in low heat dissipation efficiency and only suitable for small-capacity transformers; Forced air cooling: Ventilation holes are made in the enclosure and an external fan is installed to introduce cool external air to remove heat. However, this method has the following drawbacks:

[0005] Ventilation holes easily introduce dust and moisture, leading to a decrease in insulation performance; external fans are noisy and require regular filter cleaning, resulting in high maintenance costs; in outdoor or high-dust environments, dust and water resistance is poor; transformers operate noisily, and the enclosure has poor sound insulation. Summary of the Invention

[0006] In view of the problems of high maintenance costs, poor sound insulation and easy entry of external dust and moisture into the enclosure during heat dissipation in the existing technology, the purpose of this invention is to provide a dry transformer enclosure structure with a heat dissipation jacket.

[0007] To solve the above problems, the present invention adopts the following technical solution;

[0008] A dry-type transformer housing structure with a heat dissipation jacket includes a housing, a jacket layer on the housing, and a coolant circulation mechanism on the housing for circulating coolant in the jacket layer.

[0009] As a further description of the above technical solution:

[0010] The cooling liquid circulation mechanism includes two water rings, both of which are formed on the housing. Several conduits are fixedly connected to the inner walls of the two water rings. One end of each conduit passes through the housing and is connected to the jacket layer. A refrigeration mechanism is provided on the back of the housing.

[0011] As a further description of the above technical solution:

[0012] The refrigeration mechanism includes a chiller, and the inlet and outlet of the chiller are fixedly connected to water pipes. One end of each of the two water pipes passes through the housing and is connected to two water rings respectively. A water pump is installed on the bottom water pipe.

[0013] As a further description of the above technical solution:

[0014] The inner wall of the enclosure and the inner wall of the jacket layer are both embossed with sound-insulating patterns, and the sound-insulating patterns are wavy in shape.

[0015] As a further description of the above technical solution:

[0016] The inner wall of the jacket layer is fixedly connected with several partitions, and the conduit is located between two adjacent partitions.

[0017] As a further description of the above technical solution:

[0018] The inner wall of the box is fixedly connected to three square plates, and a fan is embedded in each of the three square plates.

[0019] As a further description of the above technical solution:

[0020] Temperature sensors are fixedly connected to one side of each of the three square plates. A controller is fixedly connected to the inner top wall of the box. The input terminal of the controller is connected to the temperature sensor signal. A flow valve is installed on the conduit in the water ring at the top. The input terminal of the flow valve is connected to the controller signal.

[0021] As a further description of the above technical solution:

[0022] An insulation layer is fixedly connected to the outside of the box, and a rubber pad is fixedly connected to the bottom of the box.

[0023] Compared with the prior art, the advantages of this invention are:

[0024] Sealed against dust and moisture, reducing maintenance costs:

[0025] The closed loop formed by the coolant circulation mechanism and the jacket layer allows the coolant to circulate and remove heat from the inside of the enclosure. This eliminates the need for ventilation holes and completely prevents external dust and moisture from entering the enclosure, greatly reducing insulation failures and maintenance frequency caused by environmental factors.

[0026] Dual improvement in heat dissipation and sound insulation:

[0027] The wavy sound insulation pattern embossed on the inner wall of the enclosure and the inner wall of the jacket layer increases the heat exchange area and enhances the heat conduction efficiency. On the other hand, it effectively scatters and absorbs electromagnetic noise and mechanical vibration sound waves, reduces noise transmission, and achieves synergistic optimization of heat dissipation and sound insulation.

[0028] Heat dissipation uniformity is significantly improved:

[0029] The baffles installed inside the jacket layer divide the coolant flow path into multiple independent channels, avoiding the "short circuit" phenomenon of coolant and ensuring that the coolant flows evenly through all areas of the jacket layer, making the temperature distribution of the inner wall of the box more uniform and significantly improving the overall heat dissipation efficiency.

[0030] Forced convection significantly improves heat exchange efficiency:

[0031] The fan installed on the inner wall of the housing forces the internal air to form a convection circulation, which greatly improves the heat transfer coefficient between the air and the cold inner wall. This effectively solves the problem of low heat transfer efficiency of traditional water-cooled jackets that rely solely on natural convection or radiation, and makes full use of the cooling capacity of the jacket layer.

[0032] Intelligent temperature control, precise energy saving:

[0033] Temperature sensors monitor the temperature of different areas inside the enclosure in real time. The controller dynamically adjusts the opening of the flow valve based on the temperature difference signal to achieve "cooling on demand". It strengthens heat dissipation for areas with severe heat generation, while avoiding excessive overall coolant flow, thus achieving the dual goals of precise temperature control and energy saving.

[0034] Synergistic optimization of thermal insulation and vibration reduction / noise reduction:

[0035] The insulation layer on the outside of the enclosure effectively blocks external temperature fluctuations from interfering with the internal thermal balance, reducing additional heat load; the rubber pad at the bottom absorbs mechanical vibration, reduces structural noise, and protects internal electronic components from long-term vibration damage, extending the service life of the equipment. Attached Figure Description

[0036] Figure 1 This is one of the perspective views of the present invention;

[0037] Figure 2 This is a second perspective view of the present invention;

[0038] Figure 3 This is a cross-sectional view of the present invention;

[0039] Figure 4 This is a top sectional view of the present invention.

[0040] Explanation of the labels in the diagram:

[0041] 1. Housing; 2. Jacket layer; 3. Cooling liquid circulation mechanism; 31. Water ring; 32. Pipe; 33. Refrigeration mechanism; 301. Chiller; 302. Water pipe; 303. Water pump; 4. Partition plate; 5. Fan; 6. Flow valve. Detailed Implementation

[0042] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0043] To reduce maintenance costs and address the issue of existing heat dissipation methods easily introducing external dust and moisture into the enclosure 1, this invention provides Embodiment 1:

[0044] Please see Figures 1-4 In this invention: a dry-type transformer housing structure with a heat dissipation jacket includes a housing 1, a jacket layer 2 on the housing 1, and a coolant circulation mechanism 3 for circulating coolant in the jacket layer 2 on the housing 1; the coolant circulation mechanism 3 includes two water rings 31, both of which are located on the housing 1, and several conduits 32 are fixedly connected to the inner walls of the two water rings 31, one end of each conduit 32 penetrating the housing 1 and communicating with the jacket layer 2; a refrigeration mechanism 33 is provided on the back of the housing 1; the refrigeration mechanism 33 includes a chiller 301, and water pipes 302 are fixedly connected to the inlet and outlet of the chiller 301, one end of each water pipe 302 penetrating the housing 1 and communicating with the two water rings 31 respectively, and a water pump 303 is installed on the bottom water pipe 302.

[0045] In this invention, the coolant is driven by the water pump 303 to form a closed loop between the water pipe 302, the water ring 31, the conduit 32 and the jacket layer 2.

[0046] When the coolant flows through the jacket layer 2, it absorbs the heat conducted through the inner wall of the box 1. Then it enters the chiller 301 for forced cooling. The cooled coolant then enters the jacket layer 2 again. This cycle repeats, thereby achieving continuous and efficient heat removal from the box 1. There is no need to open ventilation holes on the box 1, which avoids the intrusion of external dust and moisture.

[0047] To improve the heat dissipation and sound insulation of enclosure 1, this invention provides embodiment two:

[0048] Please see Figure 3 Among them, the inner wall of the box body 1 and the inner wall of the jacket layer 2 are both imprinted with sound insulation patterns, and the sound insulation patterns are wavy in shape.

[0049] In this invention, the wave-shaped sound insulation pattern embossed on the inner wall of the housing 1 and the inner wall of the jacket layer 2 increases the contact area between the inner wall and the air, enhancing the conduction of heat from the internal air to the cold wall surface; on the other hand, the wave-shaped surface can effectively scatter and absorb the electromagnetic noise and mechanical vibration sound waves generated during transformer operation, reducing the intensity of noise propagation outward, and achieving a dual improvement in heat dissipation and sound insulation.

[0050] To improve the uniformity of heat dissipation, the present invention provides Embodiment Three:

[0051] Please see Figure 4 Among them, the inner wall of the jacket layer 2 is fixedly connected with several partitions 4, and the conduit 32 is located between two adjacent partitions 4.

[0052] In this invention, the partition 4 divides the interior of the jacket layer 2 into multiple independent flow channel areas. The outlet of each conduit 32 is located between two adjacent partitions 4, so that after the coolant enters the jacket layer 2 from the top water ring 31, it must flow along the path defined by the partition 4, avoiding the coolant from "short-circuiting" in the jacket layer 2 (i.e. flowing back directly to the bottom water ring 31 without sufficient heat exchange). This ensures that the coolant flows evenly through all areas of the entire jacket layer 2, significantly improving the uniformity of the temperature distribution on the inner wall of the housing 1 and the overall heat dissipation efficiency.

[0053] The above-mentioned water-cooled jacket heat dissipation method involves setting a jacket layer 2 in the housing 1 and circulating coolant to remove heat. This type of water-cooled jacket typically relies solely on natural convection or radiation heat exchange, resulting in low heat exchange efficiency between the internal air and the cold wall surface, thus failing to fully utilize the cooling capacity of the jacket. To address this issue, the present invention provides Embodiment Four:

[0054] Please see Figure 3 and 4 Among them, the inner wall of the box 1 is fixedly connected with three square plates, and each of the three square plates is embedded with a fan 5.

[0055] In this invention, three fans 5 are installed on the square plate on the inner wall of the housing 1. When running, they forcibly agitate the air inside the housing 1, so that the air forms a forced convection circulation between the transformer surface and the cold inner wall.

[0056] Compared to natural convection, forced convection can increase the heat transfer coefficient between the air and the cold inner wall, thereby significantly improving the cooling capacity utilization of the jacket layer 2. This allows the heat generated by the transformer to be absorbed and carried away by the cold inner wall more quickly, effectively reducing the temperature rise of the transformer.

[0057] Different parts of a transformer generate different amounts of heat. To enhance heat dissipation in areas with severe heat generation, this solution provides Example 5:

[0058] Please see Figure 3 and 4 Among them: temperature sensors are fixedly connected to one side of each of the three square plates; a controller is fixedly connected to the inner top wall of the box 1; the input end of the controller is connected to the temperature sensor signal; a flow valve 6 is installed on the conduit 32 located in the top water ring 31; the input end of the flow valve 6 is connected to the controller signal.

[0059] In this invention, a temperature sensor monitors the temperature at different locations inside the enclosure 1 in real time and transmits the signal to the controller;

[0060] The controller dynamically adjusts the opening of the flow valve 6 installed on the top water ring 31 conduit 32 according to the preset temperature threshold or temperature difference strategy;

[0061] When the temperature in a certain area rises abnormally, the controller increases the opening of the flow valve 6 of the corresponding flow channel, allowing more coolant to flow through the jacket layer 2 of that area, achieving "cooling on demand". This precisely targets areas with severe heat generation to enhance heat dissipation, while avoiding excessive overall coolant flow that could lead to energy waste.

[0062] To improve the thermal insulation performance and vibration reduction and noise reduction effect of the enclosure 1 in this solution, Example 6 is provided:

[0063] Please see Figure 1 Among them: the outer side of the box 1 is fixedly connected with an insulation layer, and the bottom of the box 1 is fixedly connected with a rubber pad.

[0064] In this invention, the insulation layer (such as polyurethane foam or aerogel felt) fixedly connected to the outside of the enclosure 1 can effectively block the influence of external ambient temperature (such as high temperature in summer or low temperature in winter) on the internal temperature of the enclosure 1, reducing the additional heat load caused by external temperature fluctuations; at the same time, the rubber pad fixed at the bottom of the enclosure 1 is elastic and can absorb the mechanical vibration generated during the operation of the transformer, cut off the propagation path of vibration to the foundation, thereby reducing structural noise and protecting the electronic components inside the enclosure 1 from long-term vibration damage.

[0065] The above are merely preferred embodiments of the present invention; however, the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and its improved concept, should be covered within the scope of protection of the present invention.

Claims

1. A dry-type transformer housing structure with a heat dissipation jacket, comprising a housing (1), characterized in that: The housing (1) has a jacket layer (2) and a coolant circulation mechanism (3) for circulating coolant in the jacket layer (2) is provided on the housing (1).

2. The dry-type transformer housing structure with a heat dissipation jacket according to claim 1, characterized in that: The cooling liquid circulation mechanism (3) includes two water rings (31), both of which are opened on the box body (1). Several conduits (32) are fixedly connected to the inner walls of the two water rings (31). One end of the conduit (32) passes through the box body (1) and is connected to the jacket layer (2). A refrigeration mechanism (33) is provided on the back of the box body (1).

3. The dry-type transformer housing structure with a heat dissipation jacket according to claim 2, characterized in that: The refrigeration mechanism (33) includes a chiller (301). The inlet and outlet of the chiller (301) are fixedly connected to water pipes (302). One end of the front of each of the two water pipes (302) passes through the box (1) and is connected to two water rings (31) respectively. A water pump (303) is installed on the bottom water pipe (302).

4. The dry-type transformer tank structure with heat dissipation jacket according to claim 1, characterized in that: The inner wall of the box (1) and the inner wall of the jacket layer (2) are both embossed with sound insulation patterns, and the sound insulation patterns are wavy in shape.

5. The dry-type transformer housing structure with a heat dissipation jacket according to claim 2, characterized in that: The inner wall of the jacket layer (2) is fixedly connected with several partitions (4), and the conduit (32) is located between two adjacent partitions (4).

6. The dry-type transformer tank structure with heat dissipation jacket according to claim 1, characterized in that: The inner wall of the box (1) is fixedly connected with three square plates, and a fan (5) is embedded in each of the three square plates.

7. The dry-type transformer tank structure with heat dissipation jacket according to claim 2, characterized in that: Temperature sensors are fixedly connected to one side of each of the three square plates. A controller is fixedly connected to the inner top wall of the box (1). The input end of the controller is connected to the temperature sensor signal. A flow valve (6) is installed on the conduit (32) in the top water ring (31). The input end of the flow valve (6) is connected to the controller signal.

8. The dry-type transformer housing structure with a heat dissipation jacket according to claim 1, characterized in that: An insulation layer is fixedly connected to the outside of the box (1), and a rubber pad is fixedly connected to the bottom of the box (1).

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