A conveniently cooled electrical engineering transformer

Abstract

The application relates to the technical field of smart power grids, in particular to a power engineering transformer convenient to cool. The power engineering transformer comprises a mounting base, a coil box cover is arranged on the mounting base, a clamping piece is arranged at the upper end of the coil box cover, high-voltage terminals are equidistantly arranged on the clamping piece, the high-voltage terminals are connected with high-voltage interfaces of the coil box cover through high-voltage connecting rods, fans are equidistantly and symmetrically arranged on the mounting base, the fans correspond to the coil box covers one by one, temperature sensors are arranged at the upper ends of the coil box covers, a dustproof sealing mechanism is arranged at the lower end of the coil box cover, the dustproof sealing mechanism is used for reducing the entry of dust into the device, a heat dissipation improving mechanism is arranged in the coil box cover, and the heat dissipation improving mechanism is used for improving the heat dissipation effect of the device. The two mechanisms are cooperatively linked, can self-adaptively open and close air inlet dust prevention, simultaneously guide flow to speed up heat dissipation, and automatically clean dust on a vibrating filter screen to prevent blockage.

Description

Technical Field

[0001] This invention relates to the field of smart grid technology, specifically to a power engineering transformer that is easy to cool. Background Technology

[0002] Dry-type power transformers, with their advantages of being oil-free, fireproof, and easy to operate and maintain, are widely used in power engineering scenarios such as urban power grids, industrial plants, and commercial buildings. Their operational stability directly affects the reliability of regional power supply. Currently, the cooling and ventilation structures of existing dry-type transformers are mostly fixed, normally open air inlets, without any controllable sealing structure for the air inlets, resulting in many technical defects during long-term operation.

[0003] First, the air inlet of a traditional transformer is always open. When the equipment is under light load and in low-temperature standby mode, dust, lint, and moisture from the external environment will continuously enter the equipment through the air inlet and gradually accumulate in the filter screen and internal heat dissipation duct. Long-term use can easily cause filter clogging and narrowing of the air duct, which will significantly reduce the air circulation efficiency and cause the transformer's heat dissipation performance to decline year by year. This can easily lead to problems such as local overheating of the windings and accelerated aging of insulation, thus shortening the service life of the equipment.

[0004] Secondly, existing transformer cooling structures are relatively simple, relying solely on forced convection by fans for heat dissipation. The intake airflow lacks a directional guide structure, resulting in turbulent flow of cold air into the equipment. This slow passage through the internal air ducts leads to low heat dissipation efficiency, making it difficult to meet cooling standards under high load and high temperature conditions. This can easily cause excessive temperature rise, posing a potential power supply safety hazard. Furthermore, conventional filters are mostly fixed installations, providing only passive filtration. Dust easily adheres to the filter surface, leading to dust accumulation over time. In addition, the dustproof sealing, ventilation, and filter self-cleaning structures of existing equipment are independent, lacking mechanical linkage and coordination. This results in poor adaptability to operating conditions and a lack of adaptive adjustment based on transformer temperature changes. It is difficult to simultaneously meet the requirements of dust protection and efficient heat dissipation, thus reducing practicality and reliability.

[0005] To address the aforementioned issues, innovative designs are urgently needed based on existing approaches. Summary of the Invention

[0006] The purpose of this invention is to provide a power engineering transformer that is easy to cool, so as to solve the problems mentioned in the background. The technical solution of this invention addresses the problem that the existing technical solutions are too simplistic and provides a solution that is significantly different from the existing technology.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a power engineering transformer that is easy to cool, comprising a power engineering transformer that is easy to cool, including a mounting base, a coil box cover being provided on the mounting base, a clamp being installed on the upper end of the coil box cover, high-voltage terminals being provided at equal intervals on the clamp, and the high-voltage terminals being connected to the high-voltage interface of the coil box cover through a high-voltage connecting rod; The mounting base is symmetrically arranged with fans at equal intervals, and each fan corresponds to a coil housing. A temperature sensor is installed at the upper end of the coil housing. A dustproof sealing mechanism is provided at the lower end of the coil box cover, and the dustproof sealing mechanism is used to reduce the entry of dust into the device; A heat dissipation enhancement mechanism is installed inside the coil housing and is used to improve the heat dissipation effect of the device.

[0008] Preferably, the inner wall of the coil housing is provided with a heat dissipation duct, and two sets of air inlets are symmetrically provided at the front and rear ends of the coil housing. The air inlets are cylindrical when viewed from below, and the air inlets are interconnected with the heat dissipation duct. A filter screen is provided inside the air inlets.

[0009] Preferably, the dustproof sealing mechanism includes a sealing partition, which is slidably disposed inside the coil housing. A drive motor is installed in the internal cavity of the coil housing, and the output end of the drive motor is connected to a bidirectional threaded rod. The drive motor is controlled by a temperature sensor signal. The sealing partition is positioned corresponding to the air inlet, and the width of the sealing partition is greater than the diameter of the air inlet. The sealing partition is located at the upper end of the filter screen.

[0010] Preferably, a connecting block is fixedly installed at the rear end of the sealing partition, the sealing partition is symmetrical about the vertical center line of the connecting block, and the connecting block is threadedly connected to a bidirectional threaded rod.

[0011] Preferably, the dustproof sealing mechanism further includes an oil cylinder, which is located inside the lower end of the coil box cover. A piston rod is symmetrically arranged on the oil cylinder, and the top end of the piston rod is connected to a connecting block.

[0012] Preferably, the heat dissipation enhancement mechanism includes a threaded sleeve, which is rotatably installed inside the air inlet. An arc-shaped guide groove is provided on the inner wall of the threaded sleeve, and the threaded sleeve is positioned above the filter screen.

[0013] Preferably, an oil tank is provided at the upper end of the threaded sleeve, and the oil tank is connected to the oil cylinder through a fluid delivery hose. The piston rod II provided on the oil tank is fixedly installed at the upper end of the threaded sleeve.

[0014] Preferably, a connecting rod is rotatably mounted on the outside of the oil tank, the connecting rod is set at an equal angle on the outside of the oil tank, a guide plate is fixedly mounted on the top end of the connecting rod, and a rotating gear is fixedly mounted on the tail end of the connecting rod.

[0015] Preferably, a guide rod is fixedly installed on the upper end of the threaded sleeve, and toothed blocks are evenly arranged on the guide rod. The upper end of the guide rod is installed through the oil tank. The guide rod is positioned in a one-to-one correspondence with the connecting rod, and the toothed block meshes with the rotating gear.

[0016] Compared with the prior art, the beneficial effects of the present invention are: 1. The device collects the transformer winding temperature in real time through a temperature sensor and intelligently controls the dustproof sealing mechanism based on the equipment's heating conditions. When the transformer is under light load and low temperature standby mode and does not require forced heat dissipation, the sealing partition completely blocks the air inlet, keeping the ventilation channel of the whole machine closed. This effectively prevents external dust, lint, and other impurities from entering the machine body and avoids dust accumulation and moisture on the air duct and winding insulation surface. When the equipment load increases and the temperature exceeds the standard and heat dissipation is required, the sealing partition is released from the air outlet through the bidirectional threaded rod. The on-demand opening and closing structure reduces the drawbacks of continuous dust entry in the open ventilation structure, reduces the dust accumulation rate of the equipment, and while the equipment is ventilating and dissipating heat and the threaded sleeve is rotating to guide the air, the outer protrusion of the sleeve periodically presses the abutment block and, in conjunction with the pressure spring, elastically reciprocates to drive the filter screen to generate high-frequency micro-amplitude mechanical vibration. During the air intake filtration process of the fan, the fine dust and lint adhering to and accumulating on the filter screen surface are shaken off in real time, preventing dust from compacting and adhering and causing filter screen pore blockage. This improves the stability of the air intake ventilation flow and reduces the problems of reduced airflow and heat dissipation due to filter screen blockage. 2. This device integrates a linkage-type flow guiding mechanism inside the air inlet. When the air inlet is opened for ventilation and heat dissipation, the oil-linked transmission structure drives the threaded sleeve and guide plate to move synchronously. The arc-shaped guide groove and multi-angle guide plate directionally rectify and swirl the incoming cold air, changing the problems of disordered cold air movement, local airflow stagnation, and insufficient heat exchange in traditional systems. This allows the cold air to quickly and evenly fill the internal heat dissipation duct of the machine, efficiently and quickly adhering to the heating area of ​​the coil for sufficient heat exchange. This effectively improves the air convection heat exchange speed, reduces heat dissipation dead zones, and significantly improves the cooling and heat dissipation capacity of the transformer under high load conditions, resulting in better equipment temperature rise control. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a partial bottom view of the coil housing structure of the present invention; Figure 3This is a schematic diagram of the lower side cross-sectional structure of the coil housing of the present invention; Figure 4 This is a schematic cross-sectional view of the air inlet structure of the present invention; Figure 5 This is a schematic diagram of the three-dimensional structure of the threaded sleeve of the present invention; Figure 6 This is a bottom view of the oil tank structure of the present invention; Figure 7 This is a schematic diagram of the connection structure between the rotating gear and the tooth block of the present invention; Figure 8 This is a three-dimensional structural diagram of the bidirectional threaded rod and connecting block of the present invention.

[0018] In the diagram: 1. Mounting base; 2. Coil box cover; 3. Clamp; 4. High-voltage terminal; 5. High-voltage connecting rod; 6. Fan; 7. Temperature sensor; 8. Heat dissipation duct; 9. Air inlet; 901. Filter screen; 10. Sealing partition; 11. Drive motor; 12. Bidirectional threaded rod; 13. Connecting block; 14. Oil cylinder; 15. Piston rod one; 16. Threaded sleeve; 17. Arc-shaped guide groove; 18. Oil tank; 1801. Piston rod two; 19. Connecting rod; 20. Guide plate; 21. Rotary gear; 22. Guide rod; 2201. Tooth block; 23. Pressure spring; 24. Abutment block. Detailed Implementation

[0019] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided below.

[0020] Please see Figures 1-8 The present invention provides a technical solution: a power engineering transformer that is easy to cool, including a mounting base 1, a coil box cover 2 is provided on the mounting base 1, a clamp 3 is installed on the upper end of the coil box cover 2, high voltage terminals 4 are arranged at equal intervals on the clamp 3, and the high voltage terminals 4 are connected to the high voltage interface of the coil box cover 2 through a high voltage connecting rod 5. Fans 6 are symmetrically arranged at equal intervals on the mounting base 1. Each fan 6 corresponds to a coil box cover 2. A temperature sensor 7 is installed on the upper end of the coil box cover 2. A dustproof sealing mechanism is installed at the lower end of the coil box cover 2. The dustproof sealing mechanism is used to reduce the entry of dust into the device. The heat dissipation enhancement mechanism is located inside the coil housing 2 and is used to improve the heat dissipation effect of the device.

[0021] As one embodiment of the present invention, the inner wall of the coil box cover 2 is provided with a heat dissipation duct 8, and two sets of air inlets 9 are symmetrically provided at the front and rear ends of the coil box cover 2. The air inlets 9 are cylindrical when viewed from below, and the air inlets 9 are interconnected with the heat dissipation duct 8. A filter screen 901 is provided inside the air inlets 9.

[0022] As one embodiment of the present invention, the dustproof sealing mechanism includes a sealing partition 10, which is slidably disposed inside the coil box cover 2. A drive motor 11 is installed in the internal cavity of the coil box cover 2. The output end of the drive motor 11 is connected to a bidirectional threaded rod 12. The drive motor 11 is controlled by a signal from a temperature sensor 7. The sealing partition 10 is positioned corresponding to the air inlet 9. The width of the sealing partition 10 is greater than the diameter of the air inlet 9. The sealing partition 10 is located at the upper end of the filter screen 901.

[0023] In one embodiment of the present invention, a connecting block 13 is fixedly installed at the rear end of the sealing partition 10. The sealing partition 10 is symmetrical about the vertical center line of the connecting block 13. The connecting block 13 is threadedly connected to the bidirectional threaded rod 12.

[0024] As one embodiment of the present invention, the dustproof sealing mechanism further includes an oil cylinder 14, which is disposed inside the lower end of the coil box cover 2. Piston rods 15 are symmetrically arranged on the oil cylinder 14, and the top ends of the piston rods 15 are respectively connected to the connecting blocks 13.

[0025] The dustproof sealing mechanism is installed inside the lower end of the coil housing 2 and is controlled by a temperature sensor 7. Its core components include a sealing partition 10, a drive motor 11, a bidirectional threaded rod 12, a connecting block 13, an oil cylinder 14, and a piston rod 15. The sealing partition 10 is slidable and positioned above the filter screen 901, with a width greater than the diameter of the air inlet 9, completely blocking the air intake channel. When the transformer is in low-temperature, light-load standby mode, the drive motor 11 stops, and the sealing partition 10 closes the air inlet 9, preventing dust and moisture from entering the heat dissipation duct 8 and avoiding dust accumulation and moisture buildup in the windings. When the winding temperature exceeds the limit, the temperature sensor 7 triggers the drive motor 11 to operate, causing the bidirectional threaded rod 12 to drive the connecting block 13 to slide laterally, opening the air inlet 9. Simultaneously, the connecting block 13 drives the piston rod 15 to extend and retract, outputting hydraulic power, which in turn activates the heat dissipation lifting mechanism, achieving adaptive switching between dustproof sealing and heat dissipation conditions.

[0026] As one embodiment of the present invention, the heat dissipation enhancement mechanism includes a threaded sleeve 16, which is rotatably installed in the air inlet 9. An arc-shaped guide groove 17 is provided on the inner wall of the threaded sleeve 16, and the threaded sleeve 16 is positioned above the filter screen 901.

[0027] In one embodiment of the present invention, an oil tank 18 is provided at the upper end of the threaded sleeve 16. The oil tank 18 is connected to the oil cylinder 14 through a fluid delivery hose. The piston rod 1801 provided on the oil tank 18 is fixedly installed at the upper end of the threaded sleeve 16.

[0028] In one embodiment of the present invention, a connecting rod 19 is rotatably mounted on the outside of the oil tank 18. The connecting rod 19 is set at an equal angle on the outside of the oil tank 18. A guide plate 20 is fixedly mounted on the top end of the connecting rod 19, and a rotating gear 21 is fixedly mounted on the tail end of the connecting rod 19.

[0029] In one embodiment of the present invention, a guide rod 22 is fixedly installed on the upper end of the threaded sleeve 16, and toothed blocks 2201 are arranged at equal intervals on the guide rod 22. The upper end of the guide rod 22 is installed through the oil tank 18. The position of the guide rod 22 corresponds one-to-one with the connecting rod 19, and the tooth block 2201 meshes with the rotating gear 21.

[0030] The heat dissipation enhancement mechanism is integrated inside the air intake channel of the coil housing 2, and mainly consists of a threaded sleeve 16, an arc-shaped guide groove 17, an oil tank 18, a piston rod 1801, a guide plate 20, a rotating gear 21, a guide rod 22, a pressure spring 23, and a contact block 24. The oil tank 18 is connected to the oil cylinder 14 via a hose and can follow the action of the sealing mechanism to complete hydraulic transmission, pushing the piston rod 1801 to drive the guide plate 20 on the threaded sleeve 16 to adjust the deflection angle. The threaded sleeve 16 rotates under the action of the arc-shaped guide groove 17 on the inner wall, allowing cold air to quickly fill the heat dissipation duct 8 and reduce heat dissipation dead angles. At the same time, when the threaded sleeve 16 rotates, it periodically squeezes the contact block 24, and with the reciprocating rebound of the pressure spring 23, it drives the filter screen 901 to vibrate at high frequency for self-cleaning, effectively preventing filter screen blockage, stabilizing ventilation and heat dissipation flow, and realizing the integration of air guiding heat dissipation and filter screen self-cleaning.

[0031] Working principle: During use, when the transformer is under light load and low temperature standby conditions, and the winding temperature has not reached the forced heat dissipation threshold, the temperature sensor 7 keeps the drive motor 11 in a stopped state through the controller. At this time, the sealing partition 10 remains in a sliding sealing state, covering the air inlets 9 on the front and rear sides of the coil box cover 2, so that the air inlets 9 are closed and the heat dissipation duct 8 is isolated from the outside. Through the normally closed sealing structure of the air inlets 9, external dust and humid air are effectively blocked from entering the inside of the coil box cover 2, avoiding dust accumulation during standby and aging of the winding due to moisture, thus achieving reliable dust protection during the equipment's static stage. When the transformer load increases and the winding temperature exceeds the standard, the temperature sensor 7 collects a high temperature signal and drives the motor 11 through the controller. The output of the motor 11 drives the bidirectional threaded rod 12 to rotate. The threaded transmission of the bidirectional threaded rod 12 causes the corresponding connecting block 13 to move laterally, causing the connecting block 13 to drive the sealing partition 10 to slide synchronously, releasing the blockage of the air inlet 9 and allowing the air inlet 9 to connect with the internal heat dissipation duct 8. At the same time, the displacement of the connecting block 13 causes the piston rod 15 on the oil cylinder 14 to extend and retract, transmitting pressure to the oil tank 18 through the hydraulic oil circuit, pushing the piston rod 1801 at the lower end of the oil tank 18 to extend and retract in conjunction, and causing the oil tank 18 to move up and down synchronously. At the same time, the toothed blocks 2201 equidistantly arranged on the outer side of the guide rod 22 fixed at the upper end of the threaded sleeve 16 mesh with the rotating gear 21 inside the oil tank 18, causing the corresponding connecting rod 19 and guide plate 20 to rotate synchronously and automatically adjust the air guiding angle. The deflection of the guide plate 20 on the oil tank 18 is adjusted by the cooperation of the arc-shaped guide groove 17 and the multi-angle guide plate 20. As the fan 6 blows air, the gas enters the threaded sleeve 16 through the air inlet 9 and rotates through the arc-shaped guide groove. During the rotation of the threaded sleeve 16, the incoming cold air can be quickly and evenly guided into the heat dissipation duct 8 by the guide plate 20 and quickly fill the machine body. It fits the heating area of ​​the winding to complete efficient heat exchange, reduces heat dissipation dead angles, and significantly improves the overall heat dissipation efficiency of the transformer under high temperature conditions. While the threaded sleeve 16 rotates continuously to guide airflow and dissipate heat, its outer protrusion structure periodically presses against the abutment block 24, causing the abutment block 24 to move downward under pressure and compress the pressure spring 23 at the bottom. When the protrusion of the threaded sleeve 16 rotates and disengages from the abutment block 24, the pressure spring 23 releases its elastic potential energy to drive the abutment block 24 to quickly reset. Through continuous pressing and resetting reciprocating motion, the filter screen 901 inside the air inlet 9 generates high-frequency micro-amplitude vibration, which can shake off the dust and lint adhering to and accumulating on the surface of the filter screen during ventilation in real time, reducing filter screen blockage and ventilation volume attenuation. Under the premise of ensuring the dust prevention effect, the airflow is continuously and stably maintained, realizing the integrated linkage operation of heat dissipation and ventilation and filter screen self-cleaning, reducing the frequency of manual shutdown for cleaning and maintenance.

[0032] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A power engineering transformer with convenient cooling, comprising a mounting base (1), characterized in that: A coil box cover (2) is provided on the mounting base (1). A clamp (3) is installed on the upper end of the coil box cover (2). High voltage terminals (4) are arranged at equal intervals on the clamp (3). The high voltage terminals (4) are connected to the high voltage interface of the coil box cover (2) through a high voltage connecting rod (5). Fans (6) are symmetrically arranged at equal distances on the mounting base (1), and the fans (6) correspond one-to-one with the coil box cover (2). A temperature sensor (7) is provided at the upper end of the coil box cover (2). A dustproof sealing mechanism is provided at the lower end of the coil box cover (2), and the dustproof sealing mechanism is used to reduce the entry of dust inside the device; A heat dissipation enhancement mechanism is installed inside the coil housing (2) to improve the heat dissipation effect of the device.

2. The power engineering transformer with convenient cooling according to claim 1, characterized in that: The inner wall of the coil box cover (2) is provided with a heat dissipation duct (8). Two sets of air inlets (9) are symmetrically provided at the front and rear ends of the coil box cover (2). The air inlets (9) are cylindrical when viewed from below. The air inlets (9) are connected to the heat dissipation duct (8). A filter screen (901) is provided inside the air inlets (9).

3. A power engineering transformer with convenient cooling according to claim 2, characterized in that: The dustproof sealing mechanism includes a sealing partition (10), which is slidably positioned inside the coil box cover (2). A drive motor (11) is installed in the internal cavity of the coil box cover (2). The output end of the drive motor (11) is connected to a bidirectional threaded rod (12). The drive motor (11) is controlled by a signal from a temperature sensor (7). The sealing partition (10) is positioned opposite to the air inlet (9), the width of the sealing partition (10) is greater than the diameter of the air inlet (9), and the sealing partition (10) is located at the upper end of the filter screen (901).

4. A power engineering transformer with convenient cooling according to claim 3, characterized in that: A connecting block (13) is fixedly installed at the rear end of the sealing partition (10). The sealing partition (10) is symmetrical about the vertical center line of the connecting block (13). The connecting block (13) is threadedly connected to the bidirectional threaded rod (12).

5. A power engineering transformer with convenient cooling according to claim 4, characterized in that: The dustproof sealing mechanism also includes an oil cylinder (14), which is located inside the lower end of the coil box cover (2). A piston rod (15) is symmetrically arranged on the oil cylinder (14), and the top end of the piston rod (15) is connected to the connecting block (13).

6. A power engineering transformer with convenient cooling according to claim 5, characterized in that: The heat dissipation enhancement mechanism includes a threaded sleeve (16), which is rotatably installed in the air inlet (9). An arc-shaped guide groove (17) is provided on the inner wall of the threaded sleeve (16), and the threaded sleeve (16) is positioned above the filter screen (901).

7. A power engineering transformer with convenient cooling according to claim 6, characterized in that: An oil tank (18) is provided at the upper end of the threaded sleeve (16). The oil tank (18) is connected to the oil cylinder (14) through a liquid delivery hose. The piston rod (1801) provided on the oil tank (18) is fixedly installed at the upper end of the threaded sleeve (16).

8. A power engineering transformer with convenient cooling according to claim 7, characterized in that: A connecting rod (19) is rotatably mounted on the outside of the oil tank (18). The connecting rod (19) is set at an equal angle on the outside of the oil tank (18). A guide plate (20) is fixedly mounted on the top of the connecting rod (19). A rotating gear (21) is fixedly mounted on the tail end of the connecting rod (19).

9. A power engineering transformer with convenient cooling according to claim 8, characterized in that: The threaded sleeve (16) is fixedly installed with a guide rod (22), and toothed blocks (2201) are arranged at equal intervals on the guide rod (22). The upper end of the guide rod (22) is installed through the oil tank (18). The position of the guide rod (22) corresponds one-to-one with the connecting rod (19), and the tooth block (2201) meshes with the rotating gear (21).

10. A power engineering transformer with convenient cooling according to claim 9, characterized in that: The filter screen (901) is symmetrically provided with pressure springs (23) at both ends. The upper end of the pressure spring (23) is connected to an abutment block (24). The upper end of the abutment block (24) is set in an arc shape. The top of the abutment block (24) is located on the rotation trajectory of the outer protrusion of the threaded sleeve (16).

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