Heat dissipation device of current transformer

Abstract

The utility model discloses a heat dissipation device of a current transformer, which belongs to the technical field of current transformers and comprises a current transformer body, a mounting frame is arranged at the bottom of the current transformer body, mounting components are arranged on two sides of the mounting frame, and U-shaped cooling pipes are inserted into the surface of the current transformer body in an array manner. The cooling box and the semiconductor chilling plate are used in cooperation, a medium in the cooling box can be refrigerated, air extracted by the air inlet assembly can be cooled when flowing through the cooling bent pipe, and the cooled air is extracted by the fan and conveyed into the U-shaped cooling pipe through the conveying pipe and the annular connecting pipe, so that the cooling effect is improved. The air flowing through the interior of the U-shaped cooling pipe can simultaneously dissipate heat of the inner ring and the outer ring of the current transformer body so as to improve the heat dissipation uniformity of the inner ring and the outer ring of the current transformer body, the contact area between the U-shaped cooling pipe and the heat conductor can be increased through cooperative use of the fixing pipe and the heat dissipation fins, and the heat dissipation effect is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of current transformers, in particular to a heat dissipation device for a current transformer. Background Art

[0002] The principle of current transformer is based on the principle of electromagnetic induction. The current transformer is composed of a closed iron core and a winding. Its primary winding has few turns and is connected in series in the circuit of the current to be measured, so it often has the entire current of the circuit flowing through it. The secondary winding has more turns and is connected in series in the measuring instrument and the protection circuit. When the current transformer is working, its secondary circuit is always closed, so the impedance of the series coil of the measuring instrument and the protection circuit is very small, and the working state of the current transformer is close to a short circuit. After the existing current transformer has been used for a period of time, its body will generate heat, which will have a certain impact on the winding or passing wires, which is not conducive to wire transmission.

[0003] A Chinese patent with the publication number CN220796420U discloses a heat dissipation device for a current transformer, including a body, a base fixedly connected to the lower surface of the body, a countersunk hole opened on the upper surface of the base, a rubber ring sleeved on the surface of the body, and the inside of the rubber ring is hollow, a plurality of air outlets are opened on the inner ring surface of the rubber ring, a card plate is provided on the front of the rubber ring, a device box is fixedly connected to the side of the rubber ring, and a connecting plate is fixedly connected to the side of the device box. The utility model facilitates the rubber ring with good flexibility to be directly stuck on the current transformer through the rubber ring and the device box, and at the same time, by starting the driving motor inside the device box, it drives the fan blades to rotate, and the gas outside the box body is extracted through the fan blades and transported to the inside of the rubber ring, so that the gas inside the rubber ring dissipates heat to the body of the current transformer through the air outlet holes on its inner ring surface, and the device has the effect of dissipating heat to the current transformer.

[0004] The heat dissipation device of the current transformer involved in the above patent can only dissipate heat for the outer ring of the current transformer, while the inner ring cannot dissipate heat effectively. The uneven heat dissipation may lead to the problem of local heating. Therefore, we need to propose a heat dissipation device for the current transformer. Utility Model Content

[0005] The purpose of the utility model is to provide a heat dissipation device for a current transformer, which has the advantage of being able to uniformly dissipate heat for the current transformer, so as to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides a heat dissipation device for a current transformer, comprising a current transformer body, a mounting frame is provided at the bottom of the current transformer body, mounting components are provided on both sides of the mounting frame, a U-shaped cooling tube is plugged into the surface array of the current transformer body, an annular connecting tube is provided on the back of the current transformer body, one end of the U-shaped cooling tube is connected to the surface of the annular connecting tube, a cooling box is installed in the inner cavity of the mounting frame, an air intake assembly is provided on one side of the cooling box, and the air intake assembly is connected to the annular connecting tube.

[0007] Preferably, two sets of annular positioning frames are fixedly installed on the surface of the current transformer body, the top of the mounting frame is fixedly connected to the bottom of the annular positioning frame, and the surface of the annular positioning frame is provided with cooling pipe positioning holes that are compatible with the U-shaped cooling pipe, and the surface of the U-shaped cooling pipe is in contact with the inner wall of the cooling pipe positioning hole.

[0008] Preferably, the air intake assembly includes a cooling elbow fixedly mounted in the inner cavity of the cooling box, a filter assembly is provided at one end of the cooling elbow, a fan is fixedly mounted in the inner cavity of the mounting frame and located on one side of the cooling box, the air intake end of the fan is connected to one end of the cooling elbow, the exhaust end of the fan is connected to a delivery pipe, one end of the delivery pipe passes through the mounting frame and extends to the outside of the mounting frame to be connected to the surface of the annular connecting pipe.

[0009] Preferably, the filter assembly comprises a filter shell fixedly mounted on one side of the cooling box, one end of the cooling elbow is communicated with the surface of the filter shell, and a filter screen is fixedly mounted in the inner cavity of the filter shell.

[0010] Preferably, a semiconductor refrigeration sheet is provided at the bottom of the inner cavity of the cooling box, and the heat dissipation end of the semiconductor refrigeration sheet passes through the cooling box and extends to the outside of the cooling box.

[0011] Preferably, the mounting assembly comprises mounting plates fixedly mounted on the bottoms of both sides of the mounting frame, and mounting grooves are formed on the surfaces of the mounting plates.

[0012] Preferably, the inner ring of the current transformer body is provided with a fixed tube, the outer wall of the fixed tube is equidistantly fixedly mounted with heat sinks, and the U-shaped cooling tube is arranged on the inner side of two adjacent groups of heat sinks.

[0013] Preferably, a through hole matched with the delivery pipe is opened on one side of the mounting frame, and one end of the delivery pipe passes through the through hole and extends to the outside of the mounting frame.

[0014] Preferably, the cooling elbow is arranged in a spiral shape, and both ends of the cooling elbow pass through the cooling box and extend to the outside of the cooling box.

[0015] Preferably, one side of the cooling box is connected to a filling pipe, and one end of the filling pipe is provided with a pipe cover.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] The utility model can refrigerate the medium in the cooling box through the coordinated use of a cooling box and a semiconductor refrigeration sheet. The air drawn by the air intake component will be cooled when flowing through the cooling elbow pipe. The cooled air is drawn out by the fan and conveyed to the inside of the U-shaped cooling pipe through the conveying pipe and the annular connecting pipe. The air flowing through the inside of the U-shaped cooling pipe will dissipate the heat of the inner and outer rings of the current transformer body at the same time, so as to improve the uniformity of the heat dissipation of the inner and outer rings of the current transformer body. Through the coordinated use of the fixed tube and the heat sink, the contact area between the U-shaped cooling pipe and the heat conductor can be increased, thereby further improving the heat dissipation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the utility model;

[0019] Figure 2 This is a schematic diagram of the structure of the annular connecting pipe of the utility model;

[0020] Figure 3 This is a schematic diagram of the structure of the filter assembly of the utility model;

[0021] Figure 4 This is a schematic diagram of the structure of the cooling pipe positioning hole of the utility model;

[0022] Figure 5 This is a schematic diagram of the structure inside the cooling box of the utility model;

[0023] Figure 6 It is a structural schematic diagram of the heat sink of the utility model.

[0024] In the figure: 1. Current transformer body; 2. Mounting frame; 3. U-shaped cooling pipe; 4. Ring connecting pipe; 5. Cooling box; 6. Ring positioning frame; 7. Cooling pipe positioning hole; 8. Cooling elbow; 9. Fan; 10. Delivery pipe; 11. Filter shell; 12. Filter screen; 13. Semiconductor refrigeration sheet; 14. Mounting plate; 15. Mounting groove; 16. Fixed pipe; 17. Heat sink; 18. Through hole; 19. Filling pipe; 20. Pipe cover. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] See also Figure 1-Figure 6 The utility model provides a heat dissipation device for a current transformer, including a current transformer body 1, a mounting frame 2 is arranged at the bottom of the current transformer body 1, mounting components are arranged on both sides of the mounting frame 2, and the mounting components include mounting plates 14 fixedly mounted on the bottom of both sides of the mounting frame 2, and mounting grooves 15 are opened on the surface of the mounting plate 14.

[0027] In this embodiment, the mounting frame 2 is arranged at the bottom of the current transformer body 1. When the current transformer body 1 needs to be installed at the use position, the user can move the current transformer body 1 and place the mounting frame 2 at the bottom thereof at the installation position. Then, the user can insert the bolts into the installation grooves 15 to lock and fix the mounting plate 14 at the installation position, thereby installing and fixing the use position of the device.

[0028] Preferably, a U-shaped cooling tube 3 is inserted into the surface array of the current transformer body 1, and two groups of annular positioning frames 6 are fixedly installed on the surface of the current transformer body 1. The top of the mounting frame 2 is fixedly connected to the bottom of the annular positioning frame 6. The surface of the annular positioning frame 6 is provided with a cooling tube positioning hole 7 that is compatible with the U-shaped cooling tube 3. The surface of the U-shaped cooling tube 3 fits with the inner wall of the cooling tube positioning hole 7. An annular connecting tube 4 is provided on the back of the current transformer body 1, and one end of the U-shaped cooling tube 3 is connected to the surface of the annular connecting tube 4.

[0029] Design and installation of U-shaped cooling pipe

[0030] First, a plurality of U-shaped cooling tubes 3 are inserted in an array on the surface of the current transformer body 1. This design utilizes the natural loop characteristics of the U-shaped tube, which not only increases the contact area between the cooling medium (such as water or special coolant) and the surface of the current transformer heat source, but also promotes the effective transfer of heat energy. The U-shaped cooling tubes 3 are made of high thermal conductivity materials, such as copper or aluminum alloy, to enhance the heat exchange efficiency. They are precisely positioned in the area of ​​the current transformer body that needs heat dissipation the most to ensure that the heat can be quickly taken away.

[0031] Function and implementation of annular positioning frame

[0032] In order to ensure the stable installation and precise alignment of the U-shaped cooling tube 3, two groups of annular positioning frames 6 are fixedly installed on the surface of the current transformer body 1. These positioning frames are made of high-strength engineering plastics or metal materials, which are both light and durable. They are firmly connected to the body through fasteners such as bolts. The bottom of the annular positioning frame 6 is fixedly connected to the top of a mounting frame 2, and this mounting frame serves as a supporting structure to enhance the overall mechanical stability. More importantly, the surface of the annular positioning frame 6 is carefully designed with cooling tube positioning holes 7 that accurately match the shape of the U-shaped cooling tube 3. Each positioning hole 7 fits tightly with the contour of the U-shaped cooling tube 3, ensuring the stability and sealing of the cooling tube during operation and avoiding displacement or leakage problems caused by vibration.

[0033] Integration of annular connecting pipes

[0034] On the back of the current transformer body 1, there is a ring connecting pipe 4, which serves as the collection point of the U-shaped cooling pipe 3 to realize the circulation of the coolant. One end of the U-shaped cooling pipe 3 is connected to the surface of the ring connecting pipe 4 by welding, threaded connection or other reliable sealing methods, forming a closed cooling circuit. Such a design simplifies the wiring of the cooling system and improves the reliability and maintenance convenience of the system.

[0035] By setting the positioning frame, the U-shaped cooling tube 3 is installed in the cooling tube positioning hole 7, and the positioning frame is installed on the surface of the current transformer body 1, so as to achieve the purpose of installing and fixing the U-shaped cooling tube 3 on the surface of the current transformer body 1. When installing the U-shaped cooling tube 3, the user can insert one end of the U-shaped cooling tube into the inner cavity of the cooling tube positioning hole 7, and then connect one end of the U-shaped cooling tube 3 to the annular connecting tube 4.

[0036] Among them, the inner circle of the current transformer body 1 is provided with a fixed tube 16, and the outer wall of the fixed tube 16 is equidistantly fixedly installed with heat sinks 17, and the U-shaped cooling tube 3 is arranged on the inner side of two adjacent groups of heat sinks 17. Through the coordinated use of the fixed tube 16 and the heat sink 17, the heat of the inner circle of the current transformer body 1 will be transferred to the heat sink 17 and the outer wall of the fixed tube 16, and the surface of the U-shaped cooling tube 3 is in contact with the outer wall of the fixed tube 16 and the surface of the heat sink 17, which can expand the cooling area and improve the heat dissipation effect. In this embodiment, the side of the heat sink 17 away from the fixed tube 16 is fixedly connected to the inner circle of the current transformer body 1, and it can be connected by welding.

[0037] It is worth mentioning that a cooling box 5 is installed in the inner cavity of the mounting frame 2, and a semiconductor refrigeration plate 13 is arranged at the bottom of the inner cavity of the cooling box 5. The heat dissipation end of the semiconductor refrigeration plate 13 passes through the cooling box 5 and extends to the outside of the cooling box 5. An air intake assembly is arranged on one side of the cooling box 5, and the air intake assembly is connected to the annular connecting pipe 4. The air intake assembly includes a cooling elbow 8 fixedly installed in the inner cavity of the cooling box 5, and the cooling elbow 8 is arranged in a spiral shape. Both ends of the cooling elbow 8 pass through the cooling box 5 and extend to the outside of the cooling box 5. A fan 9 is fixedly installed in the inner cavity of the mounting frame 2 and on one side of the cooling box 5. The air intake end of the fan 9 is connected to one end of the cooling elbow 8, and the exhaust end of the fan 9 is connected to a conveying pipe 10. One end of the conveying pipe 10 passes through the mounting frame 2 and extends to the outside of the mounting frame 2 and is connected to the surface of the annular connecting pipe 4. A through hole 18 adapted to the conveying pipe 10 is opened on one side of the mounting frame 2, and one end of the conveying pipe 10 passes through the through hole 18 and extends to the outside of the mounting frame 2.

[0038] By setting the semiconductor cooling sheet 13, the medium in the cooling box 5 can be cooled. By setting the air intake assembly, the fan 9 can draw the external air into the cooling elbow 8, and the cold medium in the cooling box 5 cools the air in the cooling elbow 8. The cooled air is drawn out by the fan 9 and delivered to the U-shaped cooling tube 3 through the delivery pipe 10 and the annular connecting pipe 4. When the cold air flows through the U-shaped cooling tube 3, it will take away the heat on the inner and outer ring surfaces of the current transformer body 1, thereby achieving the purpose of heat dissipation. By setting the through hole 18, an interlaced space can be provided for the delivery pipe 10, and one end of the delivery pipe 10 will pass through the through hole 18 and reach the outside of the mounting frame 2. In addition, the heat dissipation end of the semiconductor cooling sheet 13 in this embodiment is located outside the cooling box 5 to prevent its heat dissipation from affecting the cooling of the medium inside the cooling box 5. In this embodiment, the cooling elbow 8 is arranged in a spiral shape, which can expand the contact area with the cold medium inside the cooling box 5, thereby improving the cooling effect on the air in the cooling elbow 8.

[0039] Furthermore, a filter assembly is provided at one end of the cooling elbow 8, and the filter assembly includes a filter shell 11 fixedly installed on one side of the cooling box 5. One end of the cooling elbow 8 is connected to the surface of the filter shell 11, and a filter screen 12 is fixedly installed in the inner cavity of the filter shell 11. Through the setting of the filter assembly, the extracted air can be filtered to prevent external dust or debris from being drawn into the cooling elbow 8. When the air flows through the filter shell 11, the filter screen 12 can filter the air and filter and retain the dust or debris carried in the air. In this embodiment, the filter screen 12 is installed in the inner cavity of the filter shell 11 by means of a snap connection or a bolt connection. This connection method can facilitate the disassembly of the filter screen 12, and the user can regularly disassemble and clean the filter screen 12.

[0040] Furthermore, one side of the cooling box 5 is connected to a filling pipe 19, and a pipe cover 20 is provided at one end of the filling pipe 19. The provision of the filling pipe 19 can facilitate the user to fill the interior of the cooling box 5 with medium water. The provision of the pipe cover 20 can seal the filling pipe 19 to prevent external dust or debris from entering the interior of the cooling box 5. In this embodiment, the pipe cover 20 is installed at one end of the filling pipe 19 by threaded connection or plug-in connection.

[0041] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A heat dissipation device for a current transformer, characterized in that: include: A mounting frame (2), wherein a current transformer body (1) is arranged on the top of the mounting frame (2), and mounting components are arranged on both sides of the mounting frame (2); An array of U-shaped cooling tubes (3) are inserted into the surface of the current transformer body (1); an annular connecting tube (4) is provided on the back of the current transformer body (1); one end of the U-shaped cooling tube (3) is connected to the surface of the annular connecting tube (4); A cooling box (5) is installed in the inner cavity of the mounting frame (2), and an air intake assembly is provided on one side of the cooling box (5), and the air intake assembly is connected to the annular connecting pipe (4).

2. The heat dissipation device for a current transformer according to claim 1, characterized in that: Two groups of annular positioning frames (6) are fixedly mounted on the surface of the current transformer body (1); the top of the mounting frame (2) is fixedly connected to the bottom of the annular positioning frame (6); a cooling pipe positioning hole (7) matching the U-shaped cooling pipe (3) is opened on the surface of the annular positioning frame (6); the surface of the U-shaped cooling pipe (3) is in contact with the inner wall of the cooling pipe positioning hole (7).

3. The heat dissipation device for a current transformer according to claim 1, characterized in that: The air intake assembly comprises a cooling elbow (8) fixedly mounted in the inner cavity of a cooling box (5), one end of the cooling elbow (8) being provided with a filter assembly, a fan (9) being fixedly mounted in the inner cavity of the mounting frame (2) and located on one side of the cooling box (5), the air intake end of the fan (9) being connected to one end of the cooling elbow (8), the exhaust end of the fan (9) being connected to a delivery pipe (10), one end of the delivery pipe (10) penetrating the mounting frame (2) and extending to the outside of the mounting frame (2) to be connected to the surface of the annular connecting pipe (4).

4. The heat dissipation device for a current transformer according to claim 3, characterized in that: The filter assembly comprises a filter shell (11) fixedly mounted on one side of the cooling box (5); one end of the cooling elbow (8) is in communication with the surface of the filter shell (11); and a filter screen (12) is fixedly mounted in the inner cavity of the filter shell (11).

5. The heat dissipation device for a current transformer according to claim 1, characterized in that: A semiconductor refrigeration sheet (13) is provided at the bottom of the inner cavity of the cooling box (5), and a heat dissipation end of the semiconductor refrigeration sheet (13) passes through the cooling box (5) and extends to the outside of the cooling box (5).

6. The heat dissipation device for a current transformer according to claim 1, characterized in that: The mounting assembly comprises a mounting plate (14) fixedly mounted on the bottom of both sides of the mounting frame (2), and a mounting groove (15) is provided on the surface of the mounting plate (14).

7. The heat dissipation device for a current transformer according to claim 1, characterized in that: The inner ring of the current transformer body (1) is provided with a fixed tube (16), the outer wall of the fixed tube (16) is equidistantly fixedly mounted with heat sinks (17), and the U-shaped cooling tube (3) is arranged on the inner side of two adjacent groups of heat sinks (17).

8. The heat dissipation device for a current transformer according to claim 3, characterized in that: A through hole (18) adapted to the delivery pipe (10) is provided on one side of the mounting frame (2), and one end of the delivery pipe (10) passes through the through hole (18) and extends to the outside of the mounting frame (2).

9. The heat dissipation device for a current transformer according to claim 3, characterized in that: The cooling elbow (8) is arranged in a spiral shape, and both ends of the cooling elbow (8) penetrate the cooling box (5) and extend to the outside of the cooling box (5).

10. The heat dissipation device for a current transformer according to claim 1, characterized in that: One side of the cooling box (5) is connected to a filling pipe (19), and one end of the filling pipe (19) is provided with a pipe cover (20).

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