A circulating cooling device for power transformers

Abstract

This utility model belongs to the field of power transformer technology and discloses a circulating cooling device for power transformers. It includes auxiliary components for securing and connecting the circulating coolant, a housing assembly installed on one side of the transformer body for storing coolant and dissipating heat, and a heat exchange assembly installed on the heat dissipation fins for the coolant to absorb heat during flow. The housing assembly includes a storage tank with a coolant exchange mechanism at its top and bottom for changing the inlet and outlet coolant. The heat exchange assembly includes a heat exchange plate with two pipe joints symmetrically installed at both ends. A serpentine pipe is installed inside the heat exchange plate, and a limiting heat conduction mechanism is provided on one side of the heat exchange plate. This utility model's circulating cooling device for power transformers uses flexible hose connections and locking straps for the auxiliary components, facilitating quick installation, disassembly, or expansion of the number of heat exchange plates to meet the needs of transformers of different capacities. Standardized components reduce manufacturing costs and extend the device's service life.

Description

Technical Field

[0001] This utility model belongs to the field of power transformer technology, and in particular relates to a power transformer circulating cooling device. Background Technology

[0002] As a core component of the power grid system, the stable operation of power transformers directly affects the reliability of power supply. A circulating cooling system continuously removes heat generated inside the transformer, ensuring the equipment operates within a safe temperature range. The general working principle is that the cooling medium absorbs heat from the transformer and is then transported to a radiator by a circulating pump, where it is cooled through natural convection or forced air cooling. The cooled medium then re-flows to absorb heat, forming a closed-loop cycle.

[0003] Comparing with Chinese Patent CN222380387U, a circulating cooling device for a power transformer is disclosed, including a housing structure, a circulating cooling mechanism installed within the housing structure, and a heat dissipation mechanism installed on the circulating cooling mechanism. The housing structure includes a transformer housing plate, a protective partition located on the outer wall of the transformer housing plate, four sets of combined bolts installed within the transformer housing plate and the protective partition, and a fan shroud installed in a slot inside the protective partition. By starting the motor, the motor, in conjunction with the track-driven turbine blade shaft, allows the coolant in the cooling pipe cavity to circulate actively. The continuously operating multiple cooling components continuously cool the heat-conducting outer shell. The actively circulating coolant in the cooling pipe cavity is then forcibly cooled by the multiple heat-conducting outer shells. Combined with the directional airflow from the fan blades, the cooled airflow, passing through the gaps in the cooling pipe, flows from the fan slots on the inner wall of the transformer housing plate to the various components of the transformer.

[0004] However, the aforementioned patent can only be fixedly installed on the transformer, which is not convenient for quick disassembly and maintenance, nor can it be expanded in number to meet the needs of transformers of different capacities. Therefore, a new device needs to be designed. Utility Model Content

[0005] The purpose of this invention is to provide a circulating cooling device for power transformers to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A circulating cooling device for a power transformer includes auxiliary components for securing and connecting flowing coolant, a housing assembly installed on one side of the transformer body for storing and dissipating coolant, and a heat exchange assembly installed on a heat dissipation fin assembly for the coolant flow to absorb heat. The housing assembly includes a storage tank with two cantilever frames symmetrically arranged on it. A pump is installed on one side of the storage tank, and a return connector is located on the side of the storage tank away from the pump. A fluid exchange mechanism for changing the inlet and outlet coolant is located above and below the storage tank. The heat exchange assembly includes a heat exchange plate with two pipe connectors symmetrically installed at both ends. A serpentine pipe is located inside the heat exchange plate, and a limiting heat conduction mechanism is located on one side of the heat exchange plate. The auxiliary components include a securing mechanism for securing the coolant and a series connection mechanism for connecting the flowing coolant.

[0008] Furthermore, the fluid replacement mechanism includes a filling cap installed on the top of the storage tank and a waste discharge pipe installed at the bottom of the storage tank, and a waste discharge valve is installed on the waste discharge pipe.

[0009] Furthermore, a cooling fan is provided on the side of the liquid storage tank.

[0010] Furthermore: the limiting heat conduction mechanism includes a limiting plate provided on the top of the heat exchange plate, and a plurality of heat conduction plates evenly distributed on the side of the heat exchange plate.

[0011] Furthermore, the heat exchange plate, the limiting plate, and the heat-conducting plate are welded together, and the width of the heat-conducting plate and the limiting plate is smaller than the width of the outward protrusion of the heat dissipation fin assembly.

[0012] Furthermore: the fixing mechanism includes two fixing straps arranged symmetrically at the top and bottom, and the fixing straps are equipped with buckles at their ends; the series mechanism includes a series pipe for connecting the heat exchange plates, an inlet pipe for connecting the first heat exchange plate and the infusion pump, and a return pipe for connecting the last heat exchange plate and the return connector.

[0013] Furthermore, the series pipe, the inlet pipe, and the return pipe are all made of flexible tubing.

[0014] Compared with existing technologies, the beneficial effects are:

[0015] 1. The auxiliary components use flexible hose connections (series pipes, inlet / outlet pipes) and locking straps to facilitate quick installation, disassembly, or expansion of the number of heat exchange plates to meet the needs of transformers of different capacities; standardized components (such as serpentine pipes and universal pipe fittings) reduce manufacturing costs and extend the service life of the device.

[0016] 2. By extending the coolant flow path through the serpentine pipes within the heat exchange plate, and in conjunction with the tight contact between the limiting heat conduction mechanism (limiting plate + heat conduction plate) and the heat dissipation fin assembly, the heat transfer efficiency is significantly improved, ensuring that the transformer's heat is quickly absorbed. By optimizing the heat exchange structure, simplifying the maintenance process, and enhancing heat dissipation performance, the transformer's cooling efficiency and reliability are significantly improved, making it particularly suitable for the long-term operation of power transformers under high load or high temperature environments.

[0017] 3. The design of embedding the heat-conducting plate into the gap of the heat dissipation fins directly expands the thermal contact area and avoids heat transfer loss caused by air gaps in traditional heat sinks; combined with liquid circulation cooling (active heat dissipation) and heat conduction of the heat dissipation fins (passive heat dissipation), the dual heat dissipation mechanism ensures stable operation even in high-temperature environments;

[0018] 4. The enclosure integrates liquid storage, pumping, heat dissipation (cooling fan) and liquid replacement functions (fill cap + drain valve), simplifying the coolant replacement process. Maintenance can be completed without disassembling the device, reducing operation and maintenance costs. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of a circulating cooling device for a power transformer according to the present invention;

[0020] Figure 2 This is a schematic diagram of the transformer body of the circulating cooling device for a power transformer described in this utility model;

[0021] Figure 3 This is a schematic diagram of the housing assembly of a circulating cooling device for a power transformer according to the present invention;

[0022] Figure 4 This is a right view of the housing assembly of a power transformer circulating cooling device according to this utility model;

[0023] Figure 5 This is a schematic diagram of the heat exchange component of a circulating cooling device for a power transformer according to the present invention;

[0024] Figure 6 This is a schematic diagram of the thermal auxiliary component of a power transformer circulating cooling device according to the present invention.

[0025] In the attached diagram, the following are the reference numerals: 101, storage tank; 102, cantilever frame; 103, infusion pump; 104, filling cap; 105, cooling fan; 106, waste drain pipe; 107, waste drain valve; 108, return connector; 201, heat exchange plate; 202, serpentine pipe; 203, pipe connector; 204, limiting plate; 205, heat conduction plate; 301, series pipe; 302, inlet pipe; 303, return pipe; 304, fixing strap; 305, latch; 401, transformer body; 402, heat dissipation fin assembly. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Please see Figures 1-6 A circulating cooling device for a power transformer includes auxiliary components for securing and connecting circulating coolant, a housing assembly installed on one side of the transformer body 401 for storing coolant and dissipating heat, and a heat exchange assembly installed on the heat dissipation fin assembly 402 for absorbing heat from the coolant flow.

[0028] In this embodiment: the housing assembly includes a liquid storage tank 101, with two cantilever brackets 102 symmetrically arranged on the liquid storage tank 101. A liquid infusion pump 103 is installed on one side of the liquid storage tank 101, and a return connector 108 is provided on the side of the liquid storage tank 101 away from the liquid infusion pump 103. A liquid exchange mechanism for changing the inlet and outlet coolant is provided at the top and bottom of the liquid storage tank 101. The liquid exchange mechanism includes a filling cap 104 installed on the top of the liquid storage tank 101 and a waste discharge pipe 106 provided at the bottom of the liquid storage tank 101, with a waste discharge valve 107 installed on the waste discharge pipe 106. A cooling fan 105 is provided on the side of the liquid storage tank 101. During installation, the liquid storage tank 101 is first fixed to the transformer body using the cantilever brackets 102. On one side of body 401, open and close the filling cap 104 to pour an appropriate amount of coolant into the storage tank 101. During circulation cooling, the infusion pump 103 draws coolant from the storage tank 101 and delivers it through the inlet pipe 302 to the serpentine pipe 202 of the heat exchange plate 201, allowing the coolant to absorb heat. Finally, the coolant flows back to the storage tank 101 through the return pipe 303 and dissipates the heat into the air through the cooling fan 105. When changing the coolant, open the drain valve 107 to discharge the old coolant from the storage tank 101 through the drain pipe 106, then close the drain valve 107, open the filling cap 104, and add new coolant to the storage tank 101.

[0029] In this embodiment: the heat exchange assembly includes a heat exchange plate 201, with two pipe joints 203 symmetrically installed at both ends of the heat exchange plate 201. A serpentine pipe 202 is provided inside the heat exchange plate 201, and a limiting heat conduction mechanism is provided on one side of the heat exchange plate 201. The limiting heat conduction mechanism includes a limiting plate 204 provided at the top of the heat exchange plate 201 and a plurality of heat conduction plates 205 evenly distributed on the side of the heat exchange plate 201. The heat exchange plate 201, the limiting plate 204, and the heat conduction plates 205 are welded together. The width of the heat conduction plates 205 and the limiting plate 204 is smaller than the protrusion of the heat dissipation fin assembly 402. Width; During installation, the heat exchange plate 201 is attached to the heat dissipation fin assembly 402 from the outside, and the limiting plate 204 is positioned on the top of the heat dissipation fin assembly 402. The heat conduction plate 205 is inserted between the heat dissipation fin assemblies 402. During circulating cooling, the coolant is transported to the serpentine pipe 202 of the heat exchange plate 201 through the inlet pipe 302, and flows through each heat exchange plate 201 in sequence through the series pipe 301. The transformer body 401 dissipates heat through the heat dissipation fin assembly 402. The limiting plate 204 and the heat conduction plate 205 introduce heat into the heat exchange plate 201, so that the coolant absorbs the heat.

[0030] In this embodiment: the auxiliary components include a fixing mechanism for securing and a series mechanism for connecting the circulating coolant; the fixing mechanism includes two fixing straps 304 arranged symmetrically at the top and bottom, with a locking buckle 305 installed at the end of each fixing strap 304; the series mechanism includes a series pipe 301 for connecting the heat exchange plates 201, an inlet pipe 302 for connecting the first heat exchange plate 201 and the infusion pump 103, and a return pipe 303 for connecting the last heat exchange plate 201 and the return connector 108; the series pipe 301, the inlet pipe 302, and the return pipe 303 are all made of flexible tubing; during installation, the fixing strap 304 is wrapped around the outer perimeter once, and... The heat exchange plate 201 is fixed to the transformer body 401 by the locking buckle 305. Then, the liquid pump 103 is connected to the first heat exchange plate 201 by the liquid inlet pipe 302. Each heat exchange plate 201 is connected by the series pipe 301 through the pipe joint 203. The last heat exchange plate 201 is connected to the storage tank 101 by the liquid return pipe 303 through the liquid return joint 108. During the circulation cooling, the coolant is delivered to the serpentine pipe 202 of the heat exchange plate 201 through the liquid inlet pipe 302, and flows through each heat exchange plate 201 in sequence through the series pipe 301. Finally, the coolant flows back to the storage tank 101 through the liquid return pipe 303.

[0031] Working principle: During installation, firstly, the liquid storage tank 101 is fixed to one side of the transformer body 401 using the cantilever frame 102. Then, the heat exchange plate 201 is attached to the heat dissipation fin assembly 402 from the outside, and the limiting plate 204 is positioned on the top of the heat dissipation fin assembly 402. The heat conduction plate 205 is inserted between the heat dissipation fin assembly 402. Then, the fixing strap 304 is wrapped around the outside and fixed with the buckle 305 to fix the heat exchange plate 201 to the transformer body 401. Then, the liquid inlet pipe 302 is used to connect the liquid pump 103 to the first heat exchange plate 201. The series pipe 301 is used to connect each heat exchange plate 201 through the pipe joint 203. The return pipe 303 is used to connect the last heat exchange plate 201 to the liquid storage tank 101 through the return joint 108. Finally, the filling cap 104 is opened and closed to pour an appropriate amount of coolant into the liquid storage tank 101.

[0032] During circulating cooling, the infusion pump 103 draws coolant from the storage tank 101 and delivers it through the inlet pipe 302 to the serpentine pipe 202 of the heat exchange plate 201. The coolant then flows sequentially through each heat exchange plate 201 via the series pipe 301. The transformer body 401 dissipates heat through the heat dissipation fin assembly 402. The limiting plate 204 and the heat conduction plate 205 introduce heat into the heat exchange plate 201, allowing the coolant to absorb heat. Finally, the coolant flows back to the storage tank 101 through the return pipe 303, and the heat is dissipated into the air by the cooling fan 105.

[0033] When changing the coolant, open the drain valve 107 to drain the old coolant from the reservoir 101 through the drain pipe 106, then close the drain valve 107, open the filler cap 104, and add new coolant to the reservoir 101.

[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A circulating cooling device for a power transformer, comprising auxiliary components for securing and connecting the circulating coolant, characterized in that: It also includes a housing assembly installed on one side of the transformer body (401) for storing coolant and dissipating heat, and a heat exchange assembly installed on the heat dissipation fin assembly (402) for absorbing heat from the flow of coolant; The housing assembly includes a liquid storage tank (101), two cantilever brackets (102) are symmetrically arranged on the liquid storage tank (101), a liquid transfer pump (103) is installed on one side of the liquid storage tank (101), a return connector (108) is provided on the side of the liquid storage tank (101) away from the liquid transfer pump (103), and a liquid exchange mechanism for changing the inlet and outlet coolant is provided on the upper and lower parts of the liquid storage tank (101). The heat exchange assembly includes a heat exchange plate (201), two pipe joints (203) are symmetrically installed at both ends of the heat exchange plate (201), a serpentine pipe (202) is provided inside the heat exchange plate (201), and a limiting heat conduction mechanism is provided on one side of the heat exchange plate (201). The auxiliary components include a fixing mechanism for securing and a series mechanism for connecting the circulating coolant.

2. The circulating cooling device for a power transformer according to claim 1, characterized in that: The fluid replacement mechanism includes a filling cap (104) installed on the top of the storage tank (101) and a waste discharge pipe (106) provided at the bottom of the storage tank (101), and a waste discharge valve (107) installed on the waste discharge pipe (106).

3. The circulating cooling device for a power transformer according to claim 2, characterized in that: A cooling fan (105) is provided on the side of the liquid storage tank (101).

4. The circulating cooling device for a power transformer according to claim 1, characterized in that: The limiting heat conduction mechanism includes a limiting plate (204) provided on the top of the heat exchange plate (201) and a plurality of heat conduction plates (205) evenly distributed on the side of the heat exchange plate (201).

5. A circulating cooling device for a power transformer according to claim 4, characterized in that: The heat exchange plate (201), the limiting plate (204) and the heat-conducting plate (205) are welded together, and the width of the heat-conducting plate (205) and the limiting plate (204) is smaller than the width of the outward protrusion of the heat dissipation fin assembly (402).

6. The circulating cooling device for a power transformer according to claim 1, characterized in that: The fixing mechanism includes two fixing straps (304) arranged symmetrically at the top and bottom, and the fixing straps (304) are equipped with buckles (305) at their ends; the series mechanism includes a series pipe (301) for connecting the heat exchange plates (201) together, an inlet pipe (302) for connecting the first heat exchange plate (201) and the infusion pump (103), and a return pipe (303) for connecting the last heat exchange plate (201) and the return connector (108).

7. A circulating cooling device for a power transformer according to claim 6, characterized in that: The series pipe (301), the inlet pipe (302), and the return pipe (303) are all made of flexible tubing.

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